TMUSL / T-Mobile US, Inc. - Preferred Security - SEC फाइलिंग, वार्षिक रिपोर्ट, प्रॉक्सी स्टेटमेंट

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 4, 2025 T-MOBILE US, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 4, 2025 T-MOBILE US, INC. (Exact Name of Registrant as Specified in Charter) Delaware 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Numb

T-Mobile Increasing and Accelerating Long Term Synergy Expectations Following Close of UScellular, Provides Business Update T-Mobile today provided updated guidance for its recently closed acquisition of UScellular and shared details on additional ac

EX-99.1 EXHIBIT 99.1 T-Mobile Increasing and Accelerating Long Term Synergy Expectations Following Close of UScellular, Provides Business Update T-Mobile today provided updated guidance for its recently closed acquisition of UScellular and shared details on additional actions as part of the company’s ongoing transformation. BELLEVUE, Wash. – September 4, 2025 – T-Mobile (NASDAQ: TMUS) today is pro

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 22, 2025 T-MOBILE US, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 22, 2025 T-MOBILE US, INC. (Exact Name of Registrant as Specified in Charter) Delaware 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Number

T-Mobile US, Inc. and T-Mobile USA, Inc. Announce Final Results of its Exchange Offers and Consent Solicitations for Certain of Array Digital Infrastructure, Inc.’s Outstanding Debt Securities

EX-99.1 Exhibit 99.1 T-Mobile US, Inc. and T-Mobile USA, Inc. Announce Final Results of its Exchange Offers and Consent Solicitations for Certain of Array Digital Infrastructure, Inc.’s Outstanding Debt Securities BELLEVUE, Wash., August 1, 2025—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (the “Company”) today announced, together with T-Mobile USA, Inc., its wholly-owned subsidiary (“T-Mobile

T-MOBILE USA, INC. T-MOBILE US, INC. EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 6.250% SENIOR NOTES DUE 2069 THIRTIETH SUPPLEMENTAL INDENTURE Dated as of August 5, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee Dated as of

EX-4.3 Exhibit 4.3 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 6.250% SENIOR NOTES DUE 2069 THIRTIETH SUPPLEMENTAL INDENTURE Dated as of August 5, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS Article I DEFINITIONS AND INCORPORATION BY REFERENCE 4

T-MOBILE USA, INC. T-MOBILE US, INC. EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 6.700% SENIOR NOTES DUE 2033 TWENTY-NINTH SUPPLEMENTAL INDENTURE Dated as of August 5, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee Dated as

EX-4.2 Exhibit 4.2 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 6.700% SENIOR NOTES DUE 2033 TWENTY-NINTH SUPPLEMENTAL INDENTURE Dated as of August 5, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS Article I DEFINITIONS AND INCORPORATION BY REFERENC

T-MOBILE USA, INC. T-MOBILE US, INC. EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 5.500% SENIOR NOTES DUE JUNE 2070 THIRTY-SECOND SUPPLEMENTAL INDENTURE Dated as of August 5, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee Da

EX-4.5 Exhibit 4.5 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 5.500% SENIOR NOTES DUE JUNE 2070 THIRTY-SECOND SUPPLEMENTAL INDENTURE Dated as of August 5, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS Article I DEFINITIONS AND INCORPORATION BY RE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 5, 2025 T-MOBILE US, INC. (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 5, 2025 T-MOBILE US, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 T-MOBILE US, INC. T-MOBILE USA, INC. (Exact name

8-A12B UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 T-MOBILE US, INC.

T-MOBILE USA, INC. T-MOBILE US, INC. EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 5.500% SENIOR NOTES DUE MARCH 2070 THIRTY-FIRST SUPPLEMENTAL INDENTURE Dated as of August 5, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee Da

EX-4.4 Exhibit 4.4 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 5.500% SENIOR NOTES DUE MARCH 2070 THIRTY-FIRST SUPPLEMENTAL INDENTURE Dated as of August 5, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS Article I DEFINITIONS AND INCORPORATION BY RE

Amended Director Compensation Program effective as of May 1, 2013 (amended June 4, 2014 and further amended on June 1, 2015, June 16, 2016, June 13, 2017, June 13, 2019, June 4, 2020, June 13, 2024 and June 6, 2025).

EXHIBIT 10.2 DIRECTOR COMPENSATION PROGRAM T-Mobile US, Inc. Effective as of May 1, 20131 The terms of the Director Compensation Program (the “Program”) for Non-Employee Directors of T-Mobile US, Inc. (the “Company”) are set forth herein. For purposes of the Program, a “Non-Employee Director” is any director of the Company who is not (i) an employee of the Company or any of its subsidiaries or (ii

Subsidiary Guarantors and Issuers of Guaranteed Securities.

EXHIBIT 22.1 Subsidiary Guarantors and Issuers of Guaranteed Securities Guaranteed Securities The following securities (collectively, the “T-Mobile USA Senior Notes”) issued by T-Mobile USA, Inc., a Delaware corporation and wholly-owned subsidiary of T-Mobile US, Inc. (the “Company”), were outstanding as of June 30, 2025, including those that may no longer be subject to reporting as provided by Re

3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables

EX-99.2 3 tmus06302025ex992.htm TMUS EXHIBIT 99.2 EXHIBIT 99.2 2 3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables 3 (1)AT&T Inc. does not disclose postpaid net account additions. Comcast and Charter do not disclose postpaid phone net customer additions. Industry-leading claims are based on consensus expectations if

T-Mobile Delivers Record Quarter with Outsized Customer and Financial Growth, and Raises Full Year 2025 Guidance Un-carrier Delivers Best-Ever Q2 Total Postpaid and Postpaid Phone Net and Gross Customer Additions and Maintains Network Leadership with

EXHIBIT 99.1 T-Mobile Delivers Record Quarter with Outsized Customer and Financial Growth, and Raises Full Year 2025 Guidance Un-carrier Delivers Best-Ever Q2 Total Postpaid and Postpaid Phone Net and Gross Customer Additions and Maintains Network Leadership with Largest, Fastest and Most Advanced 5G Network Industry-Leading Customer Growth Fueled by Best Network, Best Value and Best Experiences C

Form of PRSU Award Agreement.

EXHIBIT 10.1 T-MOBILE US, INC. 2023 INCENTIVE AWARD PLAN RESTRICTED STOCK UNIT GRANT NOTICE (PERFORMANCE-VESTING – TRANSFORMATION AWARD) T-Mobile US, Inc., a Delaware corporation (the “Company”), has granted to the participant listed below (“Participant”) the Restricted Stock Units (the “RSUs”) described in this Restricted Stock Unit Grant Notice (this “Grant Notice”), subject to the terms and con

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33409 T-MOB

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 23, 2025 T-MOBILE US, INC.

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 2, 2025 T-MOBILE US, INC.

T-Mobile US, Inc. and T-Mobile USA, Inc. Announce Extension of Exchange Offers and Consent Solicitations for Certain of United States Cellular Corporation’s Outstanding Debt Securities

Exhibit 99.1 T-Mobile US, Inc. and T-Mobile USA, Inc. Announce Extension of Exchange Offers and Consent Solicitations for Certain of United States Cellular Corporation’s Outstanding Debt Securities BELLEVUE, Wash., July 2, 2025—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (the “Company”) today announced that it, together with T-Mobile USA, Inc., its wholly-owned subsidiary (“T-Mobile USA”), ha

T-Mobile US, Inc. and T-Mobile USA, Inc. Announce Preliminary Results of Exchange Offers and Consent Solicitations for Certain of United States Cellular Corporation’s Outstanding Debt Securities

EX-99.1 Exhibit 99.1 T-Mobile US, Inc. and T-Mobile USA, Inc. Announce Preliminary Results of Exchange Offers and Consent Solicitations for Certain of United States Cellular Corporation’s Outstanding Debt Securities BELLEVUE, Wash., June 16, 2025—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (the “Company”) today announced, together with T-Mobile USA, Inc., its wholly-owned subsidiary (“T-Mobil

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 16, 2025 T-MOBILE US, INC. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 16, 2025 T-MOBILE US, INC.

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 6, 2025 T-MOBILE US, INC. (Exact Name of Registrant as Specified in Charter) Delaware 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Number) (

T-Mobile USA, Inc. Offers to Exchange All Outstanding Notes of United States Cellular Corporation of the Series Specified Below and Solicitation of Consents to Amend the Related Indentures Withdrawal Deadline: 5:00 p.m., New York City Time, June 13,

Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-287414 Registration No. 333-287414-57 PROSPECTUS T-Mobile USA, Inc. Offers to Exchange All Outstanding Notes of United States Cellular Corporation of the Series Specified Below and Solicitation of Consents to Amend the Related Indentures Withdrawal Deadline: 5:00 p.m., New York City Time, June 13, 2025, unless extended Early P

Form of supplemental indenture to the Indenture, dated as of September 15, 2022, by and among T-Mobile USA, Inc., the Company and Deutsche Bank Trust Company Americas, as trustee, relating to T-Mobile USA, Inc.’s 5.500% Senior Notes due June 2070.

Exhibit 4.15 T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 5.500% SENIOR NOTES DUE JUNE 2070 SUPPLEMENTAL INDENTURE Dated as of     , 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS Article I DEFINITIONS AND INCORPORATION BY REFERENCE 4 Section 1.01 Definitions 4 Secti

Form of Twelfth Supplemental Indenture to the Indenture for Senior Debt Securities dated June 1, 2002, between United States Cellular Corporation and The Bank of New York Mellon Trust Company, N.A., formerly known as BNY Midwest Trust Company of New York, relating to United States Cellular Corporation’s 6.700% Senior Notes due 2033.

Exhibit 4.8 FORM OF TWELFTH SUPPLEMENTAL INDENTURE This TWELFTH SUPPLEMENTAL INDENTURE, dated as of    , 2025 (the “Twelfth Supplemental Indenture”), is entered into by and among United States Cellular Corporation, a corporation duly organized and existing under the laws of the State of Delaware (the “Company”), and The Bank of New York Mellon Trust Company, N.A. (formerly known as The Bank of New

Form of supplemental indenture to the Indenture, dated as of September 15, 2022, by and among T-Mobile USA, Inc., the Company and Deutsche Bank Trust Company Americas, as trustee, relating to T-Mobile USA, Inc.’s 5.500% Senior Notes due March 2070.

Exhibit 4.14 T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 5.500% SENIOR NOTES DUE MARCH 2070 SUPPLEMENTAL INDENTURE Dated as of    , 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS Article I DEFINITIONS AND INCORPORATION BY REFERENCE 4 Section 1.01 Definitions 4 Secti

Form of supplemental indenture to the Indenture, dated as of September 15, 2022, by and among T-Mobile USA, Inc., the Company and Deutsche Bank Trust Company Americas, as trustee, relating to T-Mobile USA, Inc.’s 6.250% Senior Notes due 2069.

Exhibit 4.13 T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 6.250% SENIOR NOTES DUE 2069 SUPPLEMENTAL INDENTURE Dated as of    , 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS Article I DEFINITIONS AND INCORPORATION BY REFERENCE 4 Section 1.01 Definitions 4 Section 1.0

T-Mobile US, Inc. 12920 SE 38th Street Bellevue, Washington 98006

CORRESP T-Mobile US, Inc. 12920 SE 38th Street Bellevue, Washington 98006 May 20, 2025 VIA EDGAR Office of Technology Division of Corporation Finance U.S. Securities and Exchange Commission 100 F Street, NE Washington, D.C. 20549 Attn: Jeff Kauten Re: T-Mobile US, Inc. T-Mobile USA, Inc. Registration Statement on Form S-4 File Nos. 333-287414 and 333-287414-57 (the “Registration Statement”) Ladies

As filed with the Securities and Exchange Commission on May 20, 2025

Table of Contents As filed with the Securities and Exchange Commission on May 20, 2025 Registration No.

List of Guarantor Subsidiaries.

Exhibit 22.1 From time to time, T-Mobile US, Inc., as a guarantor, and its subsidiaries listed in the following table, may be obligors under debt securities issued by T-Mobile USA, Inc. pursuant to the registration statement to which this list is filed as an exhibit. Name of Subsidiary Jurisdiction of Organization Obligor Type ADstruc, LLC Delaware Guarantor APC Realty and Equipment Company, LLC D

Form of supplemental indenture to the Indenture, dated as of September 15, 2022, by and among T-Mobile USA, Inc., the Company and Deutsche Bank Trust Company Americas, as trustee, relating to T-Mobile USA, Inc.’s 6.700% Senior Notes due 2033.

Exhibit 4.12 T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 6.700% SENIOR NOTES DUE 2033 SUPPLEMENTAL INDENTURE Dated as of    , 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS Article I DEFINITIONS AND INCORPORATION BY REFERENCE 4 Section 1.01 Definitions 4 Section 1.0

Form of Fourteenth Supplemental Indenture to the Indenture for Senior Debt Securities dated June 1, 2002, between United States Cellular Corporation and The Bank of New York Mellon Trust Company, N.A., formerly known as BNY Midwest Trust Company of New York, relating to United States Cellular Corporation’s 5.500% Senior Notes due 2070.

Exhibit 4.10 FORM OF FOURTEENTH SUPPLEMENTAL INDENTURE This FOURTEENTH SUPPLEMENTAL INDENTURE, dated as of    , 2025 (the “Fourteenth Supplemental Indenture”), is entered into by and among United States Cellular Corporation, a corporation duly organized and existing under the laws of the State of Delaware (the “Company”), and The Bank of New York Mellon Trust Company, N.A. (formerly known as The B

Filing Fee Table.

Exhibit 107.1 Calculation of Filing Fee Table S-4 (Form Type) Issuer: T-Mobile USA, Inc. Guarantors: ADstruc, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Blis USA, Inc. Breeze Acquisition Sub LLC Clearwire Communications LLC Clearwire Legacy LLC Clearwire Spectrum Holdings II LLC Clearwire Spectrum Holdings III LLC C

Form of Fifteenth Supplemental Indenture to the Indenture for Senior Debt Securities dated June 1, 2002, between United States Cellular Corporation and The Bank of New York Mellon Trust Company, N.A., formerly known as BNY Midwest Trust Company of New York, relating to United States Cellular Corporation’s 5.500% Senior Notes due 2070.

Exhibit 4.11 FORM OF FIFTEENTH SUPPLEMENTAL INDENTURE This FIFTEENTH SUPPLEMENTAL INDENTURE, dated as of    , 2025 (the “Fifteenth Supplemental Indenture”), is entered into by and among United States Cellular Corporation, a corporation duly organized and existing under the laws of the State of Delaware (the “Company”), and The Bank of New York Mellon Trust Company, N.A. (formerly known as The Bank

Form T-1 Statement of Eligibility under the Trust Indenture Act of 1939, as amended, of Deutsche Bank Trust Company Americas, as Trustee under the Indenture dated as of September 15, 2022.

Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ☐ CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) DEUTSCHE BANK TRUST COMPANY AMERICAS (formerly BANKERS TRUST COMPANY) (Exact name of trustee as specifi

List of Subsidiaries

Exhibit 21.1 SUBSIDIARIES OF REGISTRANT The following is a list of subsidiaries of T-Mobile US, Inc. as of May 20, 2025. Certain subsidiaries were omitted which, considered in the aggregate, would not constitute a significant subsidiary. Name State of Incorporation ADstruc, LLC Delaware APC Realty and Equipment Company, LLC Delaware Assurance Wireless of South Carolina, LLC Delaware Assurance Wire

Form of Thirteenth Supplemental Indenture to the Indenture for Senior Debt Securities dated June 1, 2002, between United States Cellular Corporation and The Bank of New York Mellon Trust Company, N.A., formerly known as BNY Midwest Trust Company of New York, relating to United States Cellular Corporation’s 6.250% Senior Notes due 2069.

Exhibit 4.9 FORM OF THIRTEENTH SUPPLEMENTAL INDENTURE This THIRTEENTH SUPPLEMENTAL INDENTURE, dated as of    , 2025 (the “Thirteenth Supplemental Indenture”), is entered into by and among United States Cellular Corporation, a corporation duly organized and existing under the laws of the State of Delaware (the “Company”), and The Bank of New York Mellon Trust Company, N.A. (formerly known as The Ba

Conflict Minerals Report

Exhibit 1.01 T-Mobile US, Inc. Conflict Minerals Report for the Year Ended December 31, 2024 This Conflict Minerals Report is presented to comply with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the “Rules”). The Rules require issuers to disclose information regarding the use and origin of conflict minerals necessary for the functionality or production of products manufacture

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report T-MOBILE US, INC. (Exact name of registrant as specified in its charter) Delaware 1-33409 (State or other jurisdiction of incorporation or o

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report T-MOBILE US, INC. (Exact name of registrant as specified in its charter) Delaware 1-33409 (State or other jurisdiction of incorporation or organization) (Commission File Number) 12920 SE 38th Street Bellevue, Washington (Address of principal executive offices) Peter Osvaldik, Executive Vic

Subsidiary Guarantors and Issuers of Guaranteed Securities.

EXHIBIT 22.1 Subsidiary Guarantors and Issuers of Guaranteed Securities Guaranteed Securities The following securities (collectively, the “T-Mobile USA Senior Notes”) issued by T-Mobile USA, Inc., a Delaware corporation and wholly-owned subsidiary of T-Mobile US, Inc. (the “Company”), were outstanding as of March 31, 2025, including those that may no longer be subject to reporting as provided by R

Fifty-First Supplemental Indenture, dated as of March 10, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee.

EXHIBIT 4.9 FIFTY-FIRST SUPPLEMENTAL INDENTURE FIFTY-FIRST SUPPLEMENTAL INDENTURE (this “Fifty-First Supplemental Indenture”), dated as of March 10, 2025, among T-Mobile USA, Inc. (the “Company”), the entities listed on Schedule I hereto (the “New Guarantors”), the existing guarantors signatory hereto (the “Existing Guarantors”) and Deutsche Bank Trust Company Americas, as trustee under the Indent

Twenty-Fifth Supplemental Indenture, dated as of March 10, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee.

EXHIBIT 4.8 TWENTY-FIFTH SUPPLEMENTAL INDENTURE TWENTY-FIFTH SUPPLEMENTAL INDENTURE (this “Twenty-Fifth Supplemental Indenture”), dated as of March 10, 2025, among T-Mobile USA, Inc. (the “Issuer”), the entities listed on Schedule I hereto (the “New Guarantors”), the existing guarantors signatory hereto (the “Existing Guarantors”) and Deutsche Bank Trust Company Americas, as trustee (the “Trustee”

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33409 T-MO

Compensation Term Sheet, dated as of March 18, 2025, by and between T-Mobile US, Inc. and Michael J. Katz.

EXHIBIT 10.2 T-MOBILE US, INC. COMPENSATION TERM SHEET FOR MICHAEL J. KATZ This Compensation Term Sheet (the “Term Sheet”) between Michael J. Katz (“you”) and T-Mobile US, Inc. (the “Company”), effective as of March 18, 2025 (the “Effective Date”), confirms our understanding and agreement about your role and certain compensation opportunities with the Company following the Effective Date. Term You

T-Mobile Leads the Industry Once Again With Continued Durable Customer Growth, Including Best Ever Q1 Postpaid Gross and Net Additions, Translating to Outstanding Financial Growth Higher Gross Additions in Every Category Drove Industry-Leading Custom

EXHIBIT 99.1 T-Mobile Leads the Industry Once Again With Continued Durable Customer Growth, Including Best Ever Q1 Postpaid Gross and Net Additions, Translating to Outstanding Financial Growth Higher Gross Additions in Every Category Drove Industry-Leading Customer Performance, Alongside Record Q1 Diluted EPS, Strong Net Cash Provided by Operating Activities and Record Q1 Adjusted Free Cash Flow,

of LTI Award

EXHIBIT 10.1 T-Mobile US, Inc. 12920 SE 38th Street Bellevue, WA 98006-1350 March , 2025 [Name] c/o T-Mobile US, Inc. 12920 SE 38th Street Bellevue, WA 98006-1350 Re: Amendment to Outstanding Equity Awards Dear [Name]: As you know, you currently hold certain time-based restricted stock unit (“RSU”) and performance-based restricted stock unit (“PRSU”) awards covering shares of T-Mobile US, Inc. (th

Guarantee Assumption Agreement, dated as of March 10, 2025, by and among Sprint Spectrum License Holder LLC, Sprint Spectrum License Holder II LLC, Sprint Spectrum License Holder III LLC and certain subsidiary guarantors.

EXHIBIT 10.3 GUARANTEE ASSUMPTION AGREEMENT GUARANTEE ASSUMPTION AGREEMENT dated as of March 10, 2025, by ADstruc, LLC, a Delaware limited liability company, Blis USA, Inc., a Delaware corporation, Breeze Acquisition Sub LLC, a Delaware limited liability company, Vistar Media Global Partners, LLC, a New York limited liability company, and Vistar Media Inc., a Delaware corporation (collectively, th

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 24, 2025 T-MOBILE US, INC.

3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables

EXHIBIT 99.2 2 3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables 3 (1)AT&T Inc. historically does not disclose postpaid net account additions. Comcast and Charter do not disclose postpaid phone net customer additions. Industry leading claims are based on consensus expectations if results are not yet reported. (2)Cor

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amend

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amend

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 8, 2025 T-MOBILE US, INC. (Exact Name of Registrant as Specified in Charter) Delaware 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Number)

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 1, 2025 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Numb

As confidentially submitted with the Securities and Exchange Commission on March 31, 2025 This draft registration statement has not been filed publicly with the Securities and Exchange Commission and all information herein remains strictly confidenti

DRS Table of Contents As confidentially submitted with the Securities and Exchange Commission on March 31, 2025 This draft registration statement has not been filed publicly with the Securities and Exchange Commission and all information herein remains strictly confidential.

Twenty-Eighth Supplemental Indenture, dated as of March 27, 2025, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.875% Senior Note due 2055.

Exhibit 4.4 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 5.875% SENIOR NOTES DUE 2055 TWENTY-EIGHTH SUPPLEMENTAL INDENTURE Dated as of March 27, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND INCORPORATION BY REFERENCE 1 Se

T-Mobile Announces Proposed Public Offering of Senior Notes

Exhibit 99.1 T-Mobile Announces Proposed Public Offering of Senior Notes March 24, 2025 BELLEVUE, Wash.—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (“T-Mobile”) announced today that T-Mobile USA, Inc., its direct wholly-owned subsidiary (“T-Mobile USA” or the “Issuer”), plans to offer, subject to market and other conditions, senior notes (the “notes”) in a registered public offering. T-Mobile

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 27, 2025 T-MOBILE US, INC. (Exact Name of Registrant as Specified in Charter) Delaware 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Number)

Twenty-Sixth Supplemental Indenture, dated as of March 27, 2025, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.125% Senior Note due 2032.

Exhibit 4.2 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 5.125% SENIOR NOTES DUE 2032 TWENTY-SIXTH SUPPLEMENTAL INDENTURE Dated as of March 27, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND INCORPORATION BY REFERENCE 1 Sec

Underwriting Agreement, dated March 24, 2025, among T-Mobile USA, Inc., the Company, the other guarantors party thereto and the several underwriters named in Schedule 1 thereto, for which Barclays Capital Inc., Deutsche Bank Securities Inc., Morgan Stanley & Co. LLC and UBS Securities LLC acted as representatives.

EX-1.1 Exhibit 1.1 Execution Version $3,500,000,000 T-MOBILE USA, INC. 5.125% Senior Notes due 2032 5.300% Senior Notes due 2035 5.875% Senior Notes due 2055 Underwriting Agreement March 24, 2025 Barclays Capital Inc. Deutsche Bank Securities Inc. Morgan Stanley & Co. LLC UBS Securities LLC As Representatives of the  several Underwriters listed  in Schedule 1 hereto c/o Barclays Capital Inc. 745 S

Twenty-Seventh Supplemental Indenture, dated as of March 27, 2025, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.300% Senior Note due 2035.

Exhibit 4.3 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 5.300% SENIOR NOTES DUE 2035 TWENTY-SEVENTH SUPPLEMENTAL INDENTURE Dated as of March 27, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND INCORPORATION BY REFERENCE 1 S

T-Mobile Agrees to Sell $3.5 Billion of Senior Notes

Exhibit 99.2 T-Mobile Agrees to Sell $3.5 Billion of Senior Notes March 24, 2025 BELLEVUE, Wash.—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (“T-Mobile”) announced today that T-Mobile USA, Inc., its direct wholly-owned subsidiary (“T-Mobile USA” or the “Issuer”), has agreed to sell $1,250,000,000 aggregate principal amount of its 5.125% Senior Notes due 2032 (the “2032 Notes”), $1,000,000,000

T-Mobile USA, Inc. $1,250,000,000 5.125% Senior Notes due 2032 $1,000,000,000 5.300% Senior Notes due 2035 $1,250,000,000 5.875% Senior Notes due 2055

Table of Contents Filed Pursuant to Rule 424B5 Registration No. 333-271553 PROSPECTUS SUPPLEMENT (To Prospectus dated May 1, 2023) T-Mobile USA, Inc. $1,250,000,000 5.125% Senior Notes due 2032 $1,000,000,000 5.300% Senior Notes due 2035 $1,250,000,000 5.875% Senior Notes due 2055 T-Mobile USA, Inc., a Delaware corporation (“T-Mobile USA” or the “Issuer”) and a direct wholly-owned subsidiary of T-

Calculation of Filing Fee Table (Form Type) T-Mobile USA, Inc. ADstruc, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Blis USA, Inc. Breeze Acquisition Sub LLC Clearwire

Exhibit 107.1 Calculation of Filing Fee Table S-3 (Form Type) Issuer: T-Mobile USA, Inc. Guarantors: ADstruc, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Blis USA, Inc. Breeze Acquisition Sub LLC Clearwire Communications LLC Clearwire Legacy LLC Clearwire Spectrum Holdings II LLC Clearwire Spectrum Holdings III LLC C

Pricing Term Sheet T-MOBILE USA, INC. 5.125% Senior Notes due 2032 (the “2032 Notes”) 5.300% Senior Notes due 2035 (the “2035 Notes”) 5.875% Senior Notes due 2055 (the “2055 Notes” and, together with the 2032 Notes and the 2035 Notes, the “Notes”)

FWP Issuer Free Writing Prospectus filed pursuant to Rule 433 supplementing the Preliminary Prospectus Supplement dated March 24, 2025 Registration No.

Subject to Completion, dated March 24, 2025

Table of Contents Filed Pursuant to Rule 424B5 Registration No. 333-271553 The information in this preliminary prospectus supplement is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are part of an effective registration statement filed with the Securities and Exchange Commission under the Securities Act of 1933. This preliminary prospectus

Twenty-Fifth Supplemental Indenture, dated as of March 10, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee.

Exhibit 4.8 Execution Version TWENTY-FIFTH SUPPLEMENTAL INDENTURE TWENTY-FIFTH SUPPLEMENTAL INDENTURE (this “Twenty-Fifth Supplemental Indenture”), dated as of March 10, 2025, among T-Mobile USA, Inc. (the “Issuer”), the entities listed on Schedule I hereto (the “New Guarantors”), the existing guarantors signatory hereto (the “Existing Guarantors”) and Deutsche Bank Trust Company Americas, as trus

Form T-1 Statement of Eligibility under the Trust Indenture Act of 1939, as amended, of Deutsche Bank Trust Company Americas, as Trustee under the Indenture dated as of September 15, 2022.

Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ☐ CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) DEUTSCHE BANK TRUST COMPANY AMERICAS (formerly BANKERS TRUST COMPANY) (Exact name of trustee as specifi

List of Guarantor Subsidiaries.

Exhibit 22.1 Obligors From time to time, T-Mobile US, Inc., as a guarantor, and its subsidiaries listed in the following table, may be obligors under debt securities issued by T-Mobile USA, Inc. pursuant to the registration statement to which this list is filed as an exhibit. Name of Subsidiary Jurisdiction of Organization Obligor Type ADstruc, LLC Delaware Guarantor APC Realty and Equipment Compa

Filing Fee Table.

Exhibit 107.1 Calculation of Filing Fee Table Form S-3 (Form Type) Issuer: T-Mobile USA, Inc. Guarantors: ADstruc, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Blis USA, Inc. Breeze Acquisition Sub LLC Clearwire Communications LLC Clearwire Legacy LLC Clearwire Spectrum Holdings II LLC Clearwire Spectrum Holdings III

Consent of Fried, Frank, Harris, Shriver & Jacobson LLP (included in Exhibit 5.3).

EX-5.3 Exhibit 5.3 Fried, Frank, Harris, Shriver & Jacobson LLP March 24, 2025 T-Mobile US, Inc. T-Mobile USA, Inc. 12920 SE 38th Street Bellevue, WA 98006 Ladies and Gentlemen: We have acted as counsel to T-Mobile USA, Inc., a Delaware corporation (the “Company”), T-Mobile US, Inc., a Delaware corporation and the direct parent of the Company (“Parent”), and the subsidiaries of the Company listed

Powers of Attorney (included on the signature pages hereof).

As filed with the Securities and Exchange Commission on March 24, 2025 Registration No.

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 17, 2025 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Num

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 18, 2025 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 T-MOBILE US, INC. T-MOBILE USA, INC. (Exact nam

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 T-MOBILE US, INC. T-MOBILE USA, INC. (Exact name of registrant as specified in its charter) Delaware Delaware (State of incorporation or organization) 20-0836269 91-1983600 (I.R.S. Employer Identif

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 11, 2025 T-MOBILE US, INC. (Exact Name of Registrant as Specified in Charter) Delaware 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Numb

Twenty-Third Supplemental Indenture, dated as of February 11, 2025, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.500% Senior Note due 2037.

Exhibit 4.3 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 3.500% SENIOR NOTES DUE 2037 TWENTY-THIRD SUPPLEMENTAL INDENTURE Dated as of February 11, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee, Paying Agent and Registrar to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND I

T-Mobile Announces Proposed Public Offering of Euro-Denominated Senior Notes

Exhibit 99.1 T-Mobile Announces Proposed Public Offering of Euro-Denominated Senior Notes February 4, 2025 BELLEVUE, Wash.—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (“T-Mobile”) announced today that T-Mobile USA, Inc., its direct wholly-owned subsidiary (“T-Mobile USA” or the “Issuer”), plans to offer, subject to market and other conditions, euro-denominated senior notes (the “notes”) in a

Twenty-Fourth Supplemental Indenture, dated as of February 11, 2025, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.800% Senior Note due 2045.

Exhibit 4.4 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 3.800% SENIOR NOTES DUE 2045 TWENTY-FOURTH SUPPLEMENTAL INDENTURE Dated as of February 11, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee, Paying Agent and Registrar to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND

Underwriting Agreement, dated February 4, 2025, among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and the several underwriters named in Schedule 1 thereto.

Exhibit 1.1 Execution Version €2,750,000,000 T-MOBILE USA, INC. 3.150% Senior Notes due 2032 3.500% Senior Notes due 2037 3.800% Senior Notes due 2045 Underwriting Agreement February 4, 2025 Citigroup Global Markets Limited Goldman Sachs & Co. LLC J.P. Morgan Securities plc Société Générale As Representatives of the several Underwriters listed in Schedule 1 hereto c/o Citigroup Global Markets Limi

Twenty-Second Supplemental Indenture, dated as of February 11, 2025, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.150% Senior Note due 2032.

Exhibit 4.2 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 3.150% SENIOR NOTES DUE 2032 TWENTY-SECOND SUPPLEMENTAL INDENTURE Dated as of February 11, 2025 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee, Paying Agent and Registrar to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND

T-Mobile Agrees to Sell €2.75 Billion of Euro-Denominated Senior Notes

Exhibit 99.2 T-Mobile Agrees to Sell €2.75 Billion of Euro-Denominated Senior Notes February 4, 2025 BELLEVUE, Wash.—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (“T-Mobile”) announced today that T-Mobile USA, Inc., its direct wholly-owned subsidiary (“T-Mobile USA” or the “Issuer”), has agreed to sell €1,000,000,000 aggregate principal amount of its 3.150% Senior Notes due 2032 (the “2032 Not

T-Mobile USA, Inc. €1,000,000,000 3.150% Senior Notes due 2032 €1,000,000,000 3.500% Senior Notes due 2037 €  750,000,000 3.800% Senior Notes due 2045

Table of Contents Filed Pursuant to Rule 424(b)(5) Registration File Number is 333-271553 PROSPECTUS SUPPLEMENT (To Prospectus dated May 1, 2023) T-Mobile USA, Inc.

Calculation of Filing Fee Table (Form Type) T-Mobile USA, Inc. APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communications LLC Clearwire Legacy LLC Clearwire Spect

Exhibit 107.1 Calculation of Filing Fee Table S-3 (Form Type) Issuer: T-Mobile USA, Inc. Guarantors: APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communications LLC Clearwire Legacy LLC Clearwire Spectrum Holdings II LLC Clearwire Spectrum Holdings III LLC Clearwire Spectrum Holdings LLC Fixed Wireless Holdings,

List of Guarantor Subsidiaries.

Exhibit 22.1 Obligors From time to time, T-Mobile US, Inc., as a guarantor, and its subsidiaries listed in the following table, may be obligors under debt securities issued by T-Mobile USA, Inc. pursuant to the registration statement to which this list is filed as an exhibit. Name of Subsidiary Jurisdiction of Organization Obligor Type APC Realty and Equipment Company, LLC Delaware Guarantor Assur

Filing Fee Table.

Exhibit 107.1 Calculation of Filing Fee Table Form S-3 (Form Type) Issuer: T-Mobile USA, Inc. Guarantors: APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communications LLC Clearwire Legacy LLC Clearwire Spectrum Holdings II LLC Clearwire Spectrum Holdings III LLC Clearwire Spectrum Holdings LLC Fixed Wireless Hold

Subject to Completion, dated February 4, 2025

Table of Contents Filed Pursuant to Rule 424(b)(5) Registration File Number is 333-271553 The information in this preliminary prospectus supplement is not complete and may be changed.

Pricing Term Sheet T-MOBILE USA, INC. 3.150% Senior Notes due 2032 (the “2032 Notes”) 3.500% Senior Notes due 2037 (the “2037 Notes”) 3.800% Senior Notes due 2045 (the “2045 Notes” and, together with the 2032 Notes and the 2037 Notes, the “Notes”)

FWP Issuer Free Writing Prospectus filed pursuant to Rule 433 supplementing the Preliminary Prospectus Supplement dated February 4, 2025 Registration No.

Form T-1 Statement of Eligibility under the Trust Indenture Act of 1939, as amended, of Deutsche Bank Trust Company Americas, as Trustee under the Indenture dated as of September 15, 2022.

Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ☐ CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) DEUTSCHE BANK TRUST COMPANY AMERICAS (formerly BANKERS TRUST COMPANY) (Exact name of trustee as specifi

As filed with the Securities and Exchange Commission on February 4, 2025

As filed with the Securities and Exchange Commission on February 4, 2025 Registration No.

List of Guarantor Subsidiaries.

EXHIBIT 22.1 Subsidiary Guarantors and Issuers of Guaranteed Securities Guaranteed Securities The following securities (collectively, the “T-Mobile USA Senior Notes”) issued by T-Mobile USA, Inc., a Delaware corporation and wholly-owned subsidiary of T-Mobile US, Inc. (the “Company”), were outstanding as of December 31, 2024, including those that may no longer be subject to reporting as provided b

First Amendment to License Purchase Agreement and Long-term Spectrum Manager Lease Agreement, dated as of January 10, 2025, by and among T-Mobile USA, Inc., T-Mobile License LLC, T-Mobile US, Inc., Comcast OTR1, LLC, and Comcast Corporation.

EXHIBIT 10.39 FIRST AMENDMENT TO LICENSE PURCHASE AGREEMENT AND LONG-TERM SPECTRUM MANAGER LEASE AGREEMENT THIS FIRST AMENDMENT TO LICENSE PURCHASE AGREEMENT AND LONG-TERM SPECTRUM MANAGER LEASE AGREEMENT (this “First Amendment”), dated as of January 10, 2025, is entered into by and among (i) T-MOBILE USA, INC., a Delaware corporation (“T-Mobile”), (ii) T-MOBILE LICENSE LLC, a Delaware limited lia

T-Mobile US, Inc. Policy on Securities Trading

EXHIBIT 19.1 T-MOBILE US, INC. POLICY ON SECURITIES TRADING (As Amended and Restated on June 16, 2023) 1.Purpose. This Policy on Securities Trading (this "Policy") provides guidelines with respect to transactions in the securities of T-Mobile US, Inc. and its subsidiaries ("T-Mobile" or the "Company"). The Company has adopted this Policy to promote compliance by persons subject to this Policy with

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33409 T-MOBILE

Description of Securities.

EXHIBIT 4.85 DESCRIPTION OF SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 T-Mobile US, Inc., a Delaware corporation (the “Company,” “we” or “our”), currently has four classes of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended: •the Company’s common stock, par value $0.00001 per share (the “Common Stock”); •the 3.550% S

Subsidiaries of Registrant.

EXHIBIT 21.1 Subsidiaries of Registrant The following is a list of subsidiaries of T-Mobile US, Inc. as of December 31, 2024. Certain subsidiaries were omitted which, considered in the aggregate, would not constitute a significant subsidiary. Name State of Incorporation APC Realty and Equipment Company, LLC Delaware Assurance Wireless of South Carolina, LLC Delaware Assurance Wireless USA, L.P. De

Frequently Asked Questions Rule 10b5-1 Trading Plans

EXHIBIT 19.2 FREQUENTLY ASKED QUESTIONS RULE 10B5-1 TRADING PLANS Adopted on June 16, 2023 EXECUTIVE SUMMARY1 A Rule 10b5-1 trading plan is a written plan that gives insiders an affirmative defense against insider trading liability. The basic principle of a Rule 10b5-1 trading plan is a quid pro quo: the insider gains significant protection from liability in exchange for giving up some control ove

T-Mobile Delivers Best-in-Class Customer Results in 2024 as More People Joined the Un-carrier Than Ever Before, and Is Poised for Another Exciting Year of Growth in 2025 Highest-Ever Postpaid Phone Gross Additions and Record Low Postpaid Phone Churn

EXHIBIT 99.1 T-Mobile Delivers Best-in-Class Customer Results in 2024 as More People Joined the Un-carrier Than Ever Before, and Is Poised for Another Exciting Year of Growth in 2025 Highest-Ever Postpaid Phone Gross Additions and Record Low Postpaid Phone Churn Drive the Third Straight Year of Over 3 Million Postpaid Phone Net Customer Additions Alongside Industry-Leading Service Revenue and Cash

3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables

EXHIBIT 99.2 2 3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables 3 (1)AT&T Inc. historically does not disclose postpaid net account additions. Comcast and Charter do not disclose postpaid phone net customer additions. Industry leading claims are based on consensus expectations if results are not yet reported. (2)Cor

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 29, 2025 T-MOBILE US, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 29, 2025 T-MOBILE US, INC.

T-Mobile US Appoints Srinivasan Gopalan as New Chief Operating Officer New leader joins existing management team to continue growth and expansion of T-Mobile US business into the next era

Exhibit 99.1 T-Mobile US Appoints Srinivasan Gopalan as New Chief Operating Officer New leader joins existing management team to continue growth and expansion of T-Mobile US business into the next era BELLEVUE, Wash. — January 27, 2025 — T-Mobile US, Inc. (NASDAQ: TMUS) today announced the appointment of Srinivasan Gopalan as its new Chief Operating Officer (COO). Mr. Gopalan will join T-Mobile US

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 27, 2025 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File N

Regulation FD Disclosure, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 13, 2024 T-MOBILE US, INC. (Exact Name of Registrant as Specified in Charter) Delaware (State or other jurisdiction of incorporation) 1-33409 (Commission File Number) 20-0836

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 9, 2024 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File N

Following Presentation at UBS Global Media and Communications Conference, T-Mobile Reiterates Positive Growth Momentum

EX-99.1 2 d879496dex991.htm EX-99.1 EXHIBIT 99.1 Following Presentation at UBS Global Media and Communications Conference, T-Mobile Reiterates Positive Growth Momentum NEW YORK CITY – December 9, 2024 – T-Mobile CEO Mike Sievert appeared at the UBS Global Media and Communications Conference and attended a fireside chat with UBS’s John Hodulik today. Sievert expressed confidence in the company’s fu

3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables

EXHIBIT 99.2 2 3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables 3 (1)AT&T Inc. historically does not disclose postpaid net account additions. Comcast and Charter do not disclose postpaid phone net customer additions. Industry leading claims are based on consensus expectations if results are not yet reported. (2)Cor

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33409

Subsidiary Guarantors and Issuers of Guaranteed Securities.

EXHIBIT 22.1 Subsidiary Guarantors and Issuers of Guaranteed Securities Guaranteed Securities The following securities (collectively, the “T-Mobile USA Senior Notes”) issued by T-Mobile USA, Inc., a Delaware corporation and wholly-owned subsidiary of T-Mobile US, Inc. (the “Company”), were outstanding as of September 30, 2024, including those that may no longer be subject to reporting as provided

Compensation Term Sheet, dated as of September 12, 2024, by and between T-Mobile US, Inc. and Peter Osvaldik.

EXHIBIT 10.1 T-MOBILE US, INC. COMPENSATION TERM SHEET FOR PETER OSVALDIK This Compensation Term Sheet (the “Term Sheet”) between Peter Osvaldik (“you”) and T-Mobile US, Inc. (the “Company”), effective as of September 12, 2024 (the “Effective Date”), confirms our understanding and agreement about your role and certain compensation opportunities with the Company during the Term (as defined below).

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 23, 2024 T-MOBILE US, INC.

T-Mobile Delivers Industry-Leading Growth in Customers, Service Revenues, Profitability and Cash Flows in Q3, Raises 2024 Guidance Across the Board Un-carrier Delivers Highest Q3 Postpaid Phone Net Customer Additions in a Decade, Lowest Q3 Postpaid P

EXHIBIT 99.1 T-Mobile Delivers Industry-Leading Growth in Customers, Service Revenues, Profitability and Cash Flows in Q3, Raises 2024 Guidance Across the Board Un-carrier Delivers Highest Q3 Postpaid Phone Net Customer Additions in a Decade, Lowest Q3 Postpaid Phone Churn in Company History and Hits 6 Million Broadband Customer Milestone Industry-Leading Customer Growth Fueled by Best Network and

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 26, 2024 T-MOBILE US, INC. (Exact Name of Registrant as Specified in Charter) Delaware 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Num

Twentieth Supplemental Indenture, dated as of September 26, 2024, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 4.700% Senior Note due 2035.

Exhibit 4.3 T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 4.700% SENIOR NOTES DUE 2035 TWENTIETH SUPPLEMENTAL INDENTURE Dated as of September 26, 2024 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND INCORPORATION BY REFERENCE 1 Section 1.01 Definit

TMUS / T-Mobile US, Inc. / DEUTSCHE TELEKOM AG - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 29) T-Mobile US, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 872590104 (CUSIP Number) Dr. Axel Lützner Vice President DT Legal Deutsche Telekom AG Friedrich-Ebert-Allee 140 53113 Bonn, Germany +49-228-181-0 (Name, Address and Telephon

Underwriting Agreement, dated September 23, 2024, among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and the several underwriters named in Schedule 1 thereto for which J.P. Morgan Securities LLC, Morgan Stanley & Co. LLC, RBC Capital Markets, LLC and Wells Fargo Securities, LLC acted as representatives.

Exhibit 1.1 Execution Version $2,500,000,000 T-MOBILE USA, INC. 4.200% Senior Notes due 2029 4.700% Senior Notes due 2035 5.250% Senior Notes due 2055 Underwriting Agreement September 23, 2024 J.P. Morgan Securities LLC Morgan Stanley & Co. LLC RBC Capital Markets, LLC Wells Fargo Securities, LLC As Representatives of the  several Underwriters listed  in Schedule 1 hereto c/o J.P. Morgan Securitie

T-Mobile Agrees to Sell $2.5 Billion of Senior Notes

Exhibit 99.2 T-Mobile Agrees to Sell $2.5 Billion of Senior Notes September 23, 2024 BELLEVUE, Wash.—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (“T-Mobile”) announced today that T-Mobile USA, Inc., its direct wholly-owned subsidiary (“T-Mobile USA” or the “Issuer”), has agreed to sell $700,000,000 aggregate principal amount of its 4.200% Senior Notes due 2029 (the “2029 Notes”), $900,000,000

Nineteenth Supplemental Indenture, dated as of September 26, 2024, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 4.200% Senior Note due 2029.

Exhibit 4.2 T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 4.200% SENIOR NOTES DUE 2029 NINETEENTH SUPPLEMENTAL INDENTURE Dated as of September 26, 2024 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND INCORPORATION BY REFERENCE 1 Section 1.01 Defini

Twenty-First Supplemental Indenture, dated as of September 26, 2024, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.250% Senior Note due 2055.

Exhibit 4.4 T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 5.250% SENIOR NOTES DUE 2055 TWENTY-FIRST SUPPLEMENTAL INDENTURE Dated as of September 26, 2024 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND INCORPORATION BY REFERENCE 1 Section 1.01 Defi

T-Mobile Announces Proposed Public Offering of Senior Notes

Exhibit 99.1 T-Mobile Announces Proposed Public Offering of Senior Notes September 23, 2024 BELLEVUE, Wash.—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (“T-Mobile”) announced today that T-Mobile USA, Inc., its direct wholly-owned subsidiary (“T-Mobile USA” or the “Issuer”), plans to offer, subject to market and other conditions, senior notes (the “notes”) in a registered public offering. T-Mo

Calculation of Filing Fee Table (Form Type) T-Mobile USA, Inc. American Telecasting of Seattle, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communications LLC

Exhibit 107.1 Calculation of Filing Fee Table S-3 (Form Type) Issuer: T-Mobile USA, Inc. Guarantors: American Telecasting of Seattle, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communications LLC Clearwire Legacy LLC Clearwire Spectrum Holdings II LLC Clearwire Spectrum Holdings III LLC Clearwire Spectrum

T-Mobile USA, Inc. $700,000,000 4.200% Senior Notes due 2029 $900,000,000 4.700% Senior Notes due 2035 $900,000,000 5.250% Senior Notes due 2055

Table of Contents Filed Pursuant to Rule 424(b)(5) Registration File Number is 333-271553 PROSPECTUS SUPPLEMENT (To Prospectus dated May 1, 2023) T-Mobile USA, Inc.

Pricing Term Sheet T-MOBILE USA, INC. 4.200% Senior Notes due 2029 (the “2029 Notes”) 4.700% Senior Notes due 2035 (the “2035 Notes”) 5.250% Senior Notes due 2055 (the “2055 Notes” and, together with the 2029 Notes and the 2035 Notes, the “Notes”)

FWP Issuer Free Writing Prospectus filed pursuant to Rule 433 supplementing the Preliminary Prospectus Supplement dated September 23, 2024 Registration No.

List of Guarantor Subsidiaries.

Exhibit 22.1 Obligors From time to time, T-Mobile US, Inc., as a guarantor, and its subsidiaries listed in the following table, may be obligors under debt securities issued by T-Mobile USA, Inc. pursuant to the registration statement to which this list is filed as an exhibit. Name of Subsidiary Jurisdiction of Organization Obligor Type American Telecasting of Seattle, LLC Delaware Guarantor APC Re

Powers of Attorney (included on the signature pages hereof).

As filed with the Securities and Exchange Commission on September 23, 2024 Registration No.

Subject to Completion, dated September 23, 2024

424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) Registration File Number is 333-271553 The information in this preliminary prospectus supplement is not complete and may be changed.

Filing Fee Table.

Exhibit 107.1 Calculation of Filing Fee Table Form S-3 (Form Type) Issuer: T-Mobile USA, Inc. Guarantors: American Telecasting of Seattle, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communications LLC Clearwire Legacy LLC Clearwire Spectrum Holdings II LLC Clearwire Spectrum Holdings III LLC Clearwire Spec

Form T-1 Statement of Eligibility under the Trust Indenture Act of 1939, as amended, of Deutsche Bank Trust Company Americas, as Trustee under the Indenture dated as of September 15, 2022.

Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ☐ CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) DEUTSCHE BANK TRUST COMPANY AMERICAS (formerly BANKERS TRUST COMPANY) (Exact name of trustee as specifi

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 18, 2024 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File

Fueled by Network Leadership and Transformative AI-Enabled Customer Experiences, T-Mobile Outlines Ambitious Plan for Continued Growth Leadership, Value Creation and Share Taking in Wireless and Broadband While Growing New Businesses Profitable custo

EXHIBIT 99.1 Fueled by Network Leadership and Transformative AI-Enabled Customer Experiences, T-Mobile Outlines Ambitious Plan for Continued Growth Leadership, Value Creation and Share Taking in Wireless and Broadband While Growing New Businesses Profitable customer growth strategy expected to deliver outsized financial growth, including accelerating growth in Service Revenues, a nearly $10 billio

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 12, 2024 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File

Fiftieth Supplemental Indenture, dated as of May 21, 2024, by and among T-Mobile USA, Inc., the guarantors party thereto, and Deutsche Bank Trust Company Americas, as trustee.

EXHIBIT 4.4 FIFTIETH SUPPLEMENTAL INDENTURE FIFTIETH SUPPLEMENTAL INDENTURE (this “Fiftieth Supplemental Indenture”), dated as of May 21, 2024, among T-Mobile USA, Inc. (the “Company”), the entities listed on Schedule I hereto (the “New Guarantors”), the existing guarantors signatory hereto (the “Existing Guarantors”) and Deutsche Bank Trust Company Americas, as trustee under the Indenture referre

Subsidiary Guarantors and Issuers of Guaranteed Securities.

EXHIBIT 22.1 Subsidiary Guarantors and Issuers of Guaranteed Securities Guaranteed Securities The following securities (collectively, the “T-Mobile USA Senior Notes”) issued by T-Mobile USA, Inc., a Delaware corporation and wholly-owned subsidiary of T-Mobile US, Inc. (the “Company”), were outstanding as of June 30, 2024, including those that may no longer be subject to reporting as provided by Re

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33409 T-MOB

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 31, 2024 T-MOBILE US, INC.

Twenty-Fourth Supplemental Indenture, dated as of May 21, 2024, by and among T Mobile USA, Inc., the guarantors party thereto, and Deutsche Bank Trust Company Americas, as trustee.

EXHIBIT 4.5 TWENTY-FOURTH SUPPLEMENTAL INDENTURE TWENTY-FOURTH SUPPLEMENTAL INDENTURE (this “Twenty-Fourth Supplemental Indenture”), dated as of May 21, 2024, among T-Mobile USA, Inc. (the “Issuer”), the entities listed on Schedule I hereto (the “New Guarantors”), the existing guarantors signatory hereto (the “Existing Guarantors”) and Deutsche Bank Trust Company Americas, as trustee (the “Trustee

Amended and Restated T-Mobile US, Inc. Non-Qualified Deferred Executive Compensation Plan.

EXHIBIT 10.2 T-Mobile US, Inc. Non-Qualified Deferred Compensation Plan (As Amended and Restated Effective as of July 15, 2024) TABLE OF CONTENTS Page ARTICLE II Definitions 1 ARTICLE III Participation 5 ARTICLE IV Participant Deferrals and Company Allocations 5 ARTICLE V Investment of Account Balances 6 ARTICLE VI Time and Method of Benefit Payment 8 ARTICLE VII Withholding Taxes 11 ARTICLE VIII

Guarantee Assumption Agreement, dated as of May 21, 2024, by and among Sprint Spectrum License Holder, LLC, Sprint Spectrum License Holder II LLC, Sprint Spectrum License Holder III LLC and certain subsidiary guarantors.

EXHIBIT 10.3 GUARANTEE ASSUMPTION AGREEMENT GUARANTEE ASSUMPTION AGREEMENT dated as of May 21, 2024, by Mint Mobile, LLC, a Delaware limited liability company, Mint Mobile Incentive Company, LLC, a Delaware limited liability company, Mobile Match, LLC, a Delaware limited liability company, Primo Connect, Inc., a Delaware corporation and UVNV, Inc., a Delaware corporation (collectively, the “Additi

T-Mobile Delivers Industry-Leading Growth in Customers, Service Revenues and Profitability in Q2, Raises 2024 Customer and Cash Flow Guidance Un-carrier Delivers Best Q2 Postpaid Phone Net Customer Additions in Company History And Maintains Network L

EXHIBIT 99.1 T-Mobile Delivers Industry-Leading Growth in Customers, Service Revenues and Profitability in Q2, Raises 2024 Customer and Cash Flow Guidance Un-carrier Delivers Best Q2 Postpaid Phone Net Customer Additions in Company History And Maintains Network Leadership with Largest, Fastest and Most Advanced 5G Network Industry-Leading Customer Growth Fueled by Best Network and Best Value Combi

Amended Director Compensation Program effective as of May 1, 2013 (amended June 4, 2014 and further amended on June 1, 2015, June 16, 2016, June 13, 2017, June 13, 2019, June 4, 2020 and June 13, 2024).

EXHIBIT 10.1 DIRECTOR COMPENSATION PROGRAM T-Mobile US, Inc. Effective as of May 1, 20131 The terms of the Director Compensation Program (the “Program”) for Non-Employee Directors of T-Mobile US, Inc. (the “Company”) are set forth herein. For purposes of the Program, a “Non-Employee Director” is any director of the Company who is not (i) an employee of the Company or any of its subsidiaries or (ii

3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables

EXHIBIT 99.2 2 3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables 3 966666 (1)AT&T Inc. historically does not disclose postpaid net account additions. Comcast and Charter do not disclose postpaid phone net customer additions. Industry leading claims are based on consensus expectations if results are not yet reported.

Eighteenth Supplemental Indenture, dated as of May 21, 2024, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee (incorporated by reference to Exhibit 4.6 to T-Mobile’s Quarterly Report on Form 10-Q filed with the SEC on July 31, 2024).

EXHIBIT 4.6 EIGHTEENTH SUPPLEMENTAL INDENTURE EIGHTEENTH SUPPLEMENTAL INDENTURE (this “Eighteenth Supplemental Indenture”), dated as of May 21, 2024, among T-Mobile USA, Inc. (the “Issuer”), the entities listed on Schedule I hereto (the “New Guarantors”), the existing guarantors signatory hereto (the “Existing Guarantors”) and Deutsche Bank Trust Company Americas, as trustee (the “Trustee”) under

T-Mobile and KKR Announce Joint Venture to Acquire Metronet and Offer Leading Fiber Solution to More U.S. Consumers The Un-carrier will expand its broadband portfolio and offer more consumers a differentiated experience, selling fiber internet servic

EX-99.1 Exhibit 99.1 T-Mobile and KKR Announce Joint Venture to Acquire Metronet and Offer Leading Fiber Solution to More U.S. Consumers The Un-carrier will expand its broadband portfolio and offer more consumers a differentiated experience, selling fiber internet services provided by the JV using Metronet’s fiber network deployment and management expertise BELLEVUE, Wash., NEW YORK, NY, and EVANS

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 24, 2024 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Numb

TMUS / T-Mobile US, Inc. / SoftBank Group Capital Ltd - SC 13D/A Activist Investment

SC 13D/A 1 d836979dsc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 16)* T-Mobile US, Inc. (Name of Issuer) Common Stock (Title of Class of Secu

TMUS / T-Mobile US, Inc. / DEUTSCHE TELEKOM AG - AMENDMENT NO. 28 Activist Investment

SC 13D/A 1 sc13da.htm AMENDMENT NO. 28 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 28) T-Mobile US, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 872590104 (CUSIP Number) Dr. Axel Lützner Vice President DT Legal Deutsche Telekom AG Friedrich-Ebert-Allee 140 53113 Bonn, Germany +4

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 12, 2024 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Numb

TMUS / T-Mobile US, Inc. / DEUTSCHE TELEKOM AG - AMENDMENT NO. 27 Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 27) T-Mobile US, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 872590104 (CUSIP Number) Dr. Axel Lützner Vice President DT Legal Deutsche Telekom AG Friedrich-Ebert-Allee 140 53113 Bonn, Germany +49-228-181-0 (Name, Address and Telephon

TMUS / T-Mobile US, Inc. / DEUTSCHE TELEKOM AG - AMENDMENT NO. 26 Activist Investment

SC 13D/A 1 sc13da.htm AMENDMENT NO. 26 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 26) T-Mobile US, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 872590104 (CUSIP Number) Dr. Axel Lützner Vice President DT Legal Deutsche Telekom AG Friedrich-Ebert-Allee 140 53113 Bonn, Germany +4

TMUS / T-Mobile US, Inc. / SoftBank Group Capital Ltd - SC 13D/A Activist Investment

SC 13D/A 1 d796161dsc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 15)* T-Mobile US, Inc. (Name of Issuer) Common Stock (Title of Class of Secu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report T-MOBILE US, INC. (Exact name of registrant as specified in its charter) Delaware 1-33409 (State or other jurisdiction of incorporation or o

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report T-MOBILE US, INC. (Exact name of registrant as specified in its charter) Delaware 1-33409 (State or other jurisdiction of incorporation or organization) (Commission File Number) 12920 SE 38th Street Bellevue, Washington (Address of principal executive offices) Peter Osvaldik, Executive Vic

Conflict Minerals Report

EXHIBIT 1.01 T-Mobile US, Inc. Conflict Minerals Report for the Year Ended December 31, 2023 This Conflict Minerals Report is presented to comply with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the “Rules”). The Rules require issuers to disclose information regarding the use and origin of conflict minerals necessary for the functionality or production of products manufacture

Seventeenth Supplemental Indenture, dated as of May 8, 2024, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.850 % Senior Note due 2036.

Exhibit 4.4 T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 3.850% SENIOR NOTES DUE 2036 SEVENTEENTH SUPPLEMENTAL INDENTURE Dated as of May 8, 2024 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee, Paying Agent and Registrar to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS Article I DEFINITIONS AND INCORPORATION BY REFERENCE

T-Mobile Announces Proposed Public Offering of Euro-Denominated Senior Notes

Exhibit 99.1 T-Mobile Announces Proposed Public Offering of Euro-Denominated Senior Notes April 30, 2024 BELLEVUE, Wash.—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (“T-Mobile”) announced today that T-Mobile USA, Inc., its direct wholly-owned subsidiary (“T-Mobile USA” or the “Issuer”), plans to offer, subject to market and other conditions, euro-denominated senior notes (the “notes”) in a re

€2,000,000,000 T-MOBILE USA, INC. 3.550% Senior Notes due 2029 3.700% Senior Notes due 2032 3.850% Senior Notes due 2036 Underwriting Agreement

Exhibit 1.1 €2,000,000,000 T-MOBILE USA, INC. 3.550% Senior Notes due 2029 3.700% Senior Notes due 2032 3.850% Senior Notes due 2036 Underwriting Agreement April 30, 2024 Barclays Bank PLC BNP Paribas Deutsche Bank AG, London Branch J.P. Morgan Securities plc As Representatives of the several Underwriters listed in Schedule 1 hereto c/o Barclays Bank PLC 1 Churchill Place London E14 5HP United Kin

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 8, 2024 T-MOBILE US, INC. (Exact Name of Registrant as Specified in Charter) Delaware (State or other jurisdiction of incorporation) 1-33409 (Commission File Number) 20-0836269 (I

T-Mobile Agrees to Sell €2.0 Billion of Euro-Denominated Senior Notes

Exhibit 99.2 T-Mobile Agrees to Sell €2.0 Billion of Euro-Denominated Senior Notes April 30, 2024 BELLEVUE, Wash.—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (“T-Mobile”) announced today that T-Mobile USA, Inc., its direct wholly-owned subsidiary (“T-Mobile USA” or the “Issuer”), has agreed to sell €600,000,000 aggregate principal amount of its 3.550% Senior Notes due 2029 (the “2029 Notes”),

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 T-MOBILE US, INC. T-MOBILE USA, INC. (Exact nam

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 T-MOBILE US, INC. T-MOBILE USA, INC. (Exact name of registrant as specified in its charter) Delaware 20-0836269 Delaware 91-1983600 (State of incorporation or organization) (I.R.S. Employer Identif

Sixteenth Supplemental Indenture, dated as of May 8, 2024, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.700% Senior Note due 2032.

Exhibit 4.3 T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 3.700% SENIOR NOTES DUE 2032 SIXTEENTH SUPPLEMENTAL INDENTURE Dated as of May 8, 2024 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee, Paying Agent and Registrar to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS Article I DEFINITIONS AND INCORPORATION BY REFERENCE 1

Fifteenth Supplemental Indenture, dated as of May 8, 2024, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.550 % Senior Note due 2029.

Exhibit 4.2 T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 3.550% SENIOR NOTES DUE 2029 FIFTEENTH SUPPLEMENTAL INDENTURE Dated as of May 8, 2024 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee, Paying Agent and Registrar to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS Article I DEFINITIONS AND INCORPORATION BY REFERENCE 1

Filing Fee Table

EX-FILING FEES Exhibit 107.1 Calculation of Filing Fee Table Form S-3 (Form Type) T-Mobile US, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit(1) Maximum Aggregate Offering Price Fee Rate Amount of Reg

As filed with the Securities and Exchange Commission on May 6, 2024

Table of Contents As filed with the Securities and Exchange Commission on May 6, 2024 Registration No.

Calculation of Filing Fee Table (Form Type) T-Mobile USA, Inc. American Telecasting of Seattle, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communications LLC

Exhibit 107.1 Calculation of Filing Fee Table 424(b)(5) (Form Type) Issuer: T-Mobile USA, Inc. Guarantors: American Telecasting of Seattle, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communications LLC Clearwire Legacy LLC Clearwire Spectrum Holdings II LLC Clearwire Spectrum Holdings III LLC Clearwire Spe

T-Mobile USA, Inc. €600,000,000 3.550% Senior Notes due 2029 €750,000,000 3.700% Senior Notes due 2032 €650,000,000 3.850% Senior Notes due 2036

TABLE OF CONTENTS Filed Pursuant to Rule 424(b)(5) File No. 333-271553 PROSPECTUS SUPPLEMENT (To Prospectus dated May 1, 2023)   T-Mobile USA, Inc. €600,000,000 3.550% Senior Notes due 2029 €750,000,000 3.700% Senior Notes due 2032 €650,000,000 3.850% Senior Notes due 2036 T-Mobile USA, Inc., a Delaware corporation (“T-Mobile USA” or the “Issuer”) and a direct wholly-owned subsidiary of T-Mobile U

Pricing Term Sheet T-MOBILE USA, INC. 3.550% Senior Notes due 2029 (the “2029 Notes”) 3.700% Senior Notes due 2032 (the “2032 Notes”) 3.850% Senior Notes due 2036 (the “2036 Notes” and, together with the 2029 Notes and the 2032 Notes, the “Notes”)

Issuer Free Writing Prospectus filed pursuant to Rule 433 supplementing the Preliminary Prospectus Supplement dated April 30, 2024 Registration No.

Subject to Completion, dated April 30, 2024

TABLE OF CONTENTS The information in this preliminary prospectus supplement is not complete and may be changed.

Subsidiary Guarantors and Issuers of Guaranteed Securities.

EXHIBIT 22.1 Subsidiary Guarantors and Issuers of Guaranteed Securities Guaranteed Securities The following securities (collectively, the “T-Mobile USA Senior Notes”) issued by T-Mobile USA, Inc., a Delaware corporation and wholly-owned subsidiary of T-Mobile US, Inc. (the “Company”), were outstanding as of March 31, 2024, including those that may no longer be subject to reporting as provided by R

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33409 T-MO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amend

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amend

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables

EXHIBIT 99.2 2 3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables 3 (1)AT&T Inc. historically does not disclose postpaid net account additions. Comcast and Charter do not disclose postpaid phone net customer additions. Industry leading claims are based on consensus expectations if results are not yet reported. (2)Cor

T-Mobile Delivers Industry-Leading Customer, Service Revenue and Profitability Growth in Q1 2024, and Raises 2024 Guidance Un-carrier Matches Lowest Ever Q1 Postpaid Phone Churn and Surpasses 5 Million High Speed Internet Customers While Returning $4

EXHIBIT 99.1 T-Mobile Delivers Industry-Leading Customer, Service Revenue and Profitability Growth in Q1 2024, and Raises 2024 Guidance Un-carrier Matches Lowest Ever Q1 Postpaid Phone Churn and Surpasses 5 Million High Speed Internet Customers While Returning $4.3 Billion to Stockholders in Q1 Industry-Leading Customer Growth Fueled by Best Network and Best Value Combination(1) •Postpaid net acco

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 25, 2024 T-MOBILE US, INC.

TMUS / T-Mobile US, Inc. / DEUTSCHE TELEKOM AG - AMENDMENT NO. 25 Activist Investment

SC 13D/A 1 sc13da.htm AMENDMENT NO. 25 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 25) T-Mobile US, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 872590104 (CUSIP Number) Dr. Axel Lützner Vice President DT Legal Deutsche Telekom AG Friedrich-Ebert-Allee 140 53113 Bonn, Germany +4

TRANSACTION INFORMATION

EX-99.61 2 ex99-61.htm TRANSACTION INFORMATION Exhibit 61 TRANSACTION INFORMATION The below reflects the transactions in Common Stock effected by DT Holding during the past 60 days by or on behalf of the Reporting Persons, inclusive of any transactions effected through 4:00 p.m., New York City time, on March 13, 2024. All transactions occurred in the open market pursuant to a Rule 10b5-1 trading p

Amendment, dated as of October 15, 2023, to the License Purchase Agreement, dated as of July 1, 2020, by and between T-Mobile USA, Inc. and DISH Network Corporation, as approved by the Court on October 23, 2023.

EXHIBIT 10.21 AMENDMENT TO LICENSE PURCHASE AGREEMENT This AMENDMENT TO THE LICENSE PURCHASE AGREEMENT is entered into as of October 15, 2023 (this “Amendment”), by and between (i) T-Mobile USA, Inc., a Delaware corporation (“TMUS”) and (ii) DISH Network Corporation, a Nevada corporation (“DISH”). Capitalized terms used but not otherwise defined in this Amendment shall have the respective meanings

Description of Securities.

EXHIBIT 4.75 Description of Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934 T-Mobile US, Inc., a Delaware corporation (the “Company,” “we” or “our”), currently has one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended, the Company’s common stock, par value $0.00001 per share (the “Common Stock”). The following sum

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33409 T-MOBILE

List of Guarantor Subsidiaries.

EXHIBIT 22.1 Subsidiary Guarantors and Issuers of Guaranteed Securities Guaranteed Securities The following securities (collectively, the “T-Mobile USA Senior Notes”) issued by T-Mobile USA, Inc., a Delaware corporation and wholly-owned subsidiary of T-Mobile US, Inc. (the “Company”), were outstanding as of December 31, 2023, including those that may no longer be subject to reporting as provided b

Subsidiaries of Registrant.

EXHIBIT 21.1 Subsidiaries of Registrant The following is a list of subsidiaries of T-Mobile US, Inc. as of December 31, 2023. Certain subsidiaries were omitted which, considered in the aggregate, would not constitute a significant subsidiary. Name State of Incorporation American Telecasting of Seattle, LLC Delaware APC Realty and Equipment Company, LLC Delaware Assurance Wireless of South Carolina

T-Mobile US, Inc. Amended and Restated Executive Incentive Compensation Recoupment Policy.

EXHIBIT 97.1 T-Mobile US, Inc. Amended and Restated Executive Incentive Compensation Recoupment Policy T-Mobile US, Inc. (the “Company”) has adopted this Amended and Restated Executive Incentive Compensation Recoupment Policy (this “Policy”), effective as of October 2, 2023 (the “Effective Date”). This Policy amends, restates and supersedes in its entirety the Company’s Executive Incentive Compens

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 25, 2024 T-MOBILE US, INC.

T-Mobile Delivers Industry-Leading Growth in Customers, Service Revenues, Profitability and Cash Flow in 2023, Setting Up Strong 2024 Outlook Growth Investments in Q4 Resulted in Industry Leading Customer Growth Across the Board in the Quarter and Se

EXHIBIT 99.1 T-Mobile Delivers Industry-Leading Growth in Customers, Service Revenues, Profitability and Cash Flow in 2023, Setting Up Strong 2024 Outlook Growth Investments in Q4 Resulted in Industry Leading Customer Growth Across the Board in the Quarter and Set the Company Up for Continued Profitable Growth in 2024 and Beyond Industry-Leading Customer Growth Fueled by Best Network and Value Com

3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables

EXHIBIT 99.2 2 3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Guidance 15 Contacts 16 Financial and Operational Tables 3 (1)AT&T Inc. historically does not disclose postpaid net account additions. Comcast and Charter do not disclose postpaid phone net customer additions. Industry leading claims are based on consensus expectations if results are not yet reported. (2)Cor

Twelfth Supplemental Indenture, dated as of January 12, 2024, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 4.850% Senior Note due 2029.

Exhibit 4.2 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 4.850% SENIOR NOTES DUE 2029 TWELFTH SUPPLEMENTAL INDENTURE Dated as of January 12, 2024 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND INCORPORATION BY REFERENCE 1 Sectio

Thirteenth Supplemental Indenture, dated as of January 12, 2024, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.150% Senior Note due 2034.

Exhibit 4.3 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 5.150% SENIOR NOTES DUE 2034 THIRTEENTH SUPPLEMENTAL INDENTURE Dated as of January 12, 2024 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND INCORPORATION BY REFERENCE 1 Sec

Fourteenth Supplemental Indenture, dated as of January 12, 2024, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.500% Senior Note due 2055.

Exhibit 4.4 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 5.500% SENIOR NOTES DUE 2055 FOURTEENTH SUPPLEMENTAL INDENTURE Dated as of January 12, 2024 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND INCORPORATION BY REFERENCE 1 Sec

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 12, 2024 T-MOBILE US, INC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 12, 2024 T-MOBILE US, INC. (Exact Name of Registrant as Specified in Charter) Delaware 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Numbe

T-Mobile Announces Proposed Public Offering of Senior Notes

Exhibit 99.1 T-Mobile Announces Proposed Public Offering of Senior Notes January 9, 2024 BELLEVUE, Wash.—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (“T-Mobile”) announced today that T-Mobile USA, Inc., its direct wholly-owned subsidiary (“T-Mobile USA” or the “Issuer”), plans to offer, subject to market and other conditions, senior notes (the “notes”) in a registered public offering. T-Mobil

Underwriting Agreement, dated January 9, 2024, among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and the several underwriters named in Schedule 1 thereto for which Citigroup Global Markets Inc., Goldman Sachs & Co. LLC, Morgan Stanley & Co. LLC and UBS Securities LLC acted as representatives.

Exhibit 1.1 Execution Version $3,000,000,000 T-MOBILE USA, INC. 4.850% Senior Notes due 2029 5.150% Senior Notes due 2034 5.500% Senior Notes due 2055 Underwriting Agreement January 9, 2024 Citigroup Global Markets Inc. Goldman Sachs & Co. LLC Morgan Stanley & Co. LLC UBS Securities LLC As Representatives of the several Underwriters listed in Schedule 1 hereto c/o Citigroup Global Markets Inc. 388

T-Mobile Agrees to Sell $3.0 Billion of Senior Notes

Exhibit 99.2 T-Mobile Agrees to Sell $3.0 Billion of Senior Notes January 9, 2024 BELLEVUE, Wash.—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (“T-Mobile”) announced today that T-Mobile USA, Inc., its direct wholly-owned subsidiary (“T-Mobile USA” or the “Issuer”), has agreed to sell $1,000,000,000 aggregate principal amount of its 4.850% Senior Notes due 2029 (the “2029 Notes”), $1,250,000,00

T-Mobile USA, Inc. $1,000,000,000 4.850% Senior Notes due 2029 $1,250,000,000 5.150% Senior Notes due 2034 $ 750,000,000 5.500% Senior Notes due 2055

424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) File No. 333-271553 PROSPECTUS SUPPLEMENT (To Prospectus dated May 1, 2023) T-Mobile USA, Inc. $1,000,000,000 4.850% Senior Notes due 2029 $1,250,000,000 5.150% Senior Notes due 2034 $ 750,000,000 5.500% Senior Notes due 2055 T-Mobile USA, Inc., a Delaware corporation (“T-Mobile USA” or the “Issuer”) and a direct wholly-owned subsidiary of T

Calculation of Filing Fee Table (Form Type) T-Mobile USA, Inc. American Telecasting of Seattle, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communications LLC

Exhibit 107.1 Calculation of Filing Fee Table 424(b)(5) (Form Type) Issuer: T-Mobile USA, Inc. Guarantors: American Telecasting of Seattle, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communications LLC Clearwire Legacy LLC Clearwire Spectrum Holdings II LLC Clearwire Spectrum Holdings III LLC Clearwire Spe

Pricing Term Sheet T-MOBILE USA, INC. 4.850% Senior Notes due 2029 (the “2029 Notes”) 5.150% Senior Notes due 2034 (the “2034 Notes”) 5.500% Senior Notes due 2055 (the “2055 Notes” and, together with the 2029 Notes and the 2034 Notes, the “Notes”)

Issuer Free Writing Prospectus filed pursuant to Rule 433 supplementing the Preliminary Prospectus Supplement dated January 9, 2024 Registration No.

Subject to Completion, dated January 9, 2024

424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) File No. 333-271553 The information in this preliminary prospectus supplement is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are part of an effective registration statement filed with the Securities and Exchange Commission under the Securities Act of 1933. This preliminary prospectu

Power of Attorney for T-Mobile Global Zwischenholding GmbH, dated as of November 28, 2023

EX-24.2 3 ex24-2.htm POWER OF ATTORNEY FOR T-MOBILE GLOBAL ZWISCHENHOLDING GMBH Exhibit 24.2 [Execution Version] POWER OF ATTORNEY Know all by these present, that the undersigned hereby constitutes and appoints Axel Lützner, Roman Zitz and Christoph Appel, any such person signing individually, as the undersigned’s true and lawful attorneys-in-fact, solely in connection with the undersigned’s owner

Power of Attorney for T-Mobile Global Holding GmbH, dated as of November 28, 2023

EX-24.3 4 ex24-3.htm POWER OF ATTORNEY FOR T-MOBILE GLOBAL HOLDING GMBH Exhibit 24.3 [Execution Version] POWER OF ATTORNEY Know all by these present, that the undersigned hereby constitutes and appoints Axel Lützner, Roman Zitz and Christoph Appel, any such person signing individually, as the undersigned’s true and lawful attorneys-in-fact, solely in connection with the undersigned’s ownership, ac

TMUS / T-Mobile US, Inc. / DEUTSCHE TELEKOM AG - AMENDMENT NO. 24 Activist Investment

SC 13D/A 1 sc13da.htm AMENDMENT NO. 24 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 24) T-Mobile US, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 872590104 (CUSIP Number) Dr. Axel Lützner Vice President DT Legal Deutsche Telekom AG Friedrich-Ebert-Allee 140 53113 Bonn, Germany +4

Power of Attorney for Deutsche Telekom AG, dated as of November 28, 2023

EX-24.1 2 ex24-1.htm POWER OF ATTORNEY FOR DEUTSCHE TELEKOM AG Exhibit 24.1 [Execution Version] POWER OF ATTORNEY Know all by these present, that the undersigned hereby constitutes and appoints Axel Lützner, Roman Zitz and Christoph Appel, any such person signing individually, as the undersigned’s true and lawful attorneys-in-fact, solely in connection with the undersigned’s ownership, acquisition

Power of Attorney for Deutsche Telekom Holding B.V., dated as of November 20, 2023

EX-24.4 5 ex24-4.htm POWER OF ATTORNEY FOR DEUTSCHE TELEKOM HOLDING B.V. Exhibit 24.4 [Execution Version] POWER OF ATTORNEY Know all by these present, that the undersigned hereby constitutes and appoints Jan Willem Hesselink, Frans Roose, Roman Zitz, Axel Liitzner and Christoph Appel, any such person signing individually, as the undersigned's true and lawful attorneys-in-fact, solely in connection

POWER OF ATTORNEY

Exhibit 24.1 [Execution Version] POWER OF ATTORNEY Know all by these present, that the undersigned hereby constitutes and appoints Axel Lützner, Roman Zitz and Christoph Appel, any such person signing individually, as the undersigned’s true and lawful attorneys-in-fact, solely in connection with the undersigned’s ownership, acquisition or disposition of common stock of T-Mobile US, Inc., to: (1) e

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 22, 2023 T-MOBILE US, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 22, 2023 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) Delaware 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File

JOINT FILING AGREEMENT

EX-99.29 2 d683664dex9929.htm EX-99.29 Exhibit 29 JOINT FILING AGREEMENT The undersigned hereby agree that the foregoing statement on Schedule 13D is filed on behalf of each of the undersigned, and any amendments thereto executed by the undersigned shall be filed on behalf of each of the undersigned without the necessity of filing any additional joint filing agreement. The undersigned acknowledge

TMUS / T-Mobile US, Inc. / SoftBank Group Capital Ltd - SC 13D/A Activist Investment

SC 13D/A 1 d683664dsc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 14)* T-Mobile US, Inc. (Name of Issuer) Common Stock (Title of Class of Secu

TMUS / T-Mobile US Inc / DEUTSCHE TELEKOM AG - AMENDMENT NO. 23 Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 23) T-Mobile US, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 872590104 (CUSIP Number) Dr. Axel Lützner Vice President DT Legal Deutsche Telekom AG Friedrich-Ebert-Allee 140 53113 Bonn, Germany +49-228-181-0 (Name, Address and Telephon

Amendment No.1, dated as of August 25, 2023, to the Amended and Restated License Purchase Agreement, dated as of March 30, 2023, by and among T-Mobile USA, Inc., T-Mobile License LLC, Nextel West Corp., and LB License Co, LLC and to the License Purchase Agreement, dated as of March 30, 2023, by and among T-Mobile USA, Inc., T-Mobile License LLC, Nextel West Corp., and LB License Co, LLC.

EXHIBIT 10.2 AMENDMENT NO. 1 TO THE AMENDED AND RESTATED LICENSE PURCHASE AGREEMENT BY AND AMONG T-MOBILE USA, INC., T-MOBILE LICENSE LLC, NEXTEL WEST CORP., AND LB LICENSE CO, LLC DATED AS OF MARCH 30, 2023 AND TO THE LICENSE PURCHASE AGREEMENT BY AND AMONG T-MOBILE USA, INC., T-MOBILE LICENSE LLC, NEXTEL WEST CORP., AND LB LICENSE CO, LLC DATED AS OF MARCH 30, 2023 THIS AMENDMENT NO. 1 (this “Am

Letter Agreement, dated as of September 6, 2023, by and between the Company and Peter Ewens.

EXHIBIT 10.3 T-MOBILE US, INC. 12920 SE 38th Street Bellevue, WA 98006-1350 8/24/2023 Peter Ewens 8620 NE 21st Place Clyde Hill, WA 98004 RE: Eligibility for Certain Payments and Benefits Dear Peter: This letter (the “Letter”) outlines certain payments and benefits that you will be eligible for upon your retirement from T-Mobile US, Inc. (the “Company”) on February 1, 2024 (the “Retirement Date”,

Subsidiary Guarantors and Issuers of Guaranteed Securities.

EXHIBIT 22.1 Subsidiary Guarantors and Issuers of Guaranteed Securities Guaranteed Securities The following securities (collectively, the “T-Mobile USA Senior Notes”) issued by T-Mobile USA, Inc., a Delaware corporation and wholly-owned subsidiary of T-Mobile US, Inc. (the “Company”), were outstanding as of September 30, 2023, including those that may no longer be subject to reporting as provided

T-Mobile Outpaces the Industry on Customer and Service Revenue Growth, Delivers Highest Cash Flow in Company History in Q3 2023 and Raises Guidance Again Un-carrier Reaches Network Milestone by Covering 300 Million People with Ultra Capacity 5G Month

EXHIBIT 99.1 T-Mobile Outpaces the Industry on Customer and Service Revenue Growth, Delivers Highest Cash Flow in Company History in Q3 2023 and Raises Guidance Again Un-carrier Reaches Network Milestone by Covering 300 Million People with Ultra Capacity 5G Months Ahead of Schedule and Delivers its Lowest Q3 Postpaid Phone Churn in Company History Industry-Leading Customer Growth Fueled by Best Ne

Amendment No.1, dated as of August 25, 2023, to the Amended and Restated License Purchase Agreement, dated as of March 30, 2023, by and among T-Mobile USA, Inc., T-Mobile License LLC, Nextel West Corp., and Channel 51 License Co LLC and to the License Purchase Agreement, dated as of March 30, 2023, by and among T-Mobile USA, Inc., T-Mobile License LLC, Nextel West Corp., and Channel 51 License Co LLC.

EXHIBIT 10.1 AMENDMENT NO. 1 TO THE AMENDED AND RESTATED LICENSE PURCHASE AGREEMENT BY AND AMONG T-MOBILE USA, INC., T-MOBILE LICENSE LLC, NEXTEL WEST CORP., AND CHANNEL 51 LICENSE CO LLC DATED AS OF MARCH 30, 2023 AND TO THE LICENSE PURCHASE AGREEMENT BY AND AMONG T-MOBILE USA, INC., T-MOBILE LICENSE LLC, NEXTEL WEST CORP., AND CHANNEL 51 LICENSE CO LLC DATED AS OF MARCH 30, 2023 THIS AMENDMENT N

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 25, 2023 T-MOBILE US, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33409

3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Merger & Integration 15 Guidance 16 Contacts 17 Financial and Operational Tables

EXHIBIT 99.2 2 3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Merger & Integration 15 Guidance 16 Contacts 17 Financial and Operational Tables 3 (1)AT&T Inc. historically does not disclose postpaid net account additions. Comcast and Charter do not disclose postpaid phone net customer additions. Industry leading claims are based on consensus expectations if results are

License Purchase Agreement, dated as of September 12, 2023, by and among T-Mobile USA, Inc., T-Mobile License LLC, T-Mobile US, Inc., Comcast OTR1, LLC, and Comcast Corporation.

EXHIBIT 10.4 LICENSE PURCHASE AGREEMENT by and among T-MOBILE USA, INC., T-MOBILE LICENSE LLC, T-MOBILE US, INC., COMCAST OTR1, LLC, and COMCAST CORPORATION Dated as of September 12, 2023 TABLE OF CONTENTS Page ARTICLE 1 Definitions 1 ARTICLE 2 PURCHASE AND SALE OF LICENSES 5 Section 2.1 Purchase and Sale of Licenses 5 Section 2.2 No Assumption of Liabilities 6 Section 2.3 Closings 7 ARTICLE 3 REP

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 25, 2023 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) Delaware 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File

TMUS / T-Mobile US Inc / DEUTSCHE TELEKOM AG - AMENDMENT NO. 22 Activist Investment

SC 13D/A 1 sc13da.htm AMENDMENT NO. 22 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 22) T-Mobile US, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 872590104 (CUSIP Number) Dr. Axel Lützner Vice President DT Legal Deutsche Telekom AG Friedrich-Ebert-Allee 140 53113 Bonn, Germany +4

T-MOBILE USA, INC. 5.750% Senior Notes due 2034 6.000% Senior Notes due 2054 Underwriting Agreement

Exhibit 1.1 Execution Version $2,000,000,000 T-MOBILE USA, INC. 5.750% Senior Notes due 2034 6.000% Senior Notes due 2054 Underwriting Agreement September 11, 2023 Citigroup Global Markets Inc. Morgan Stanley & Co. LLC RBC Capital Markets, LLC Wells Fargo Securities, LLC As Representatives of the several Underwriters listed in Schedule 1 hereto c/o Citigroup Global Markets Inc. 388 Greenwich Stree

T-Mobile Agrees to Sell $2.0 Billion of Senior Notes

Exhibit 99.2 T-Mobile Agrees to Sell $2.0 Billion of Senior Notes September 11, 2023 BELLEVUE, Wash.—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (“T-Mobile”) announced today that T-Mobile USA, Inc., its direct wholly-owned subsidiary (“T-Mobile USA” or the “Issuer”), has agreed to sell $1,000,000,000 aggregate principal amount of its 5.750% Senior Notes due 2034 (the “2034 Notes”) and $1,000,

TMUS / T-Mobile US Inc / DEUTSCHE TELEKOM AG - AMENDMENT NO. 21 Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 21) T-Mobile US, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 872590104 (CUSIP Number) Dr. Axel Lützner Vice President DT Legal Deutsche Telekom AG Friedrich-Ebert-Allee 140 53113 Bonn, Germany +49-228-181-0 (Name, Address and Telephon

Tenth Supplemental Indenture, dated as of September 14, 2023, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.750% Senior Note due 2034.

Exhibit 4.2 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 5.750% SENIOR NOTES DUE 2034 TENTH SUPPLEMENTAL INDENTURE Dated as of September 14, 2023 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS Article I DEFINITIONS AND INCORPORATION BY REFERENCE 1 Sectio

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 14, 2023 T-MOBILE US, INC. (Exact Name of Registrant as Specified in Charter) Delaware (State or other jurisdiction of incorporation) 1-33409 (Commission File Number) 20-083

Eleventh Supplemental Indenture, dated as of September 14, 2023, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 6.000% Senior Note due 2054.

Exhibit 4.3 Execution Version T-MOBILE USA, INC. and T-MOBILE US, INC. and EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO 6.000% SENIOR NOTES DUE 2054 ELEVENTH SUPPLEMENTAL INDENTURE Dated as of September 14, 2023 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022 TABLE OF CONTENTS Article I DEFINITIONS AND INCORPORATION BY REFERENCE 1 Sec

T-Mobile Announces Proposed Public Offering of Senior Notes

Exhibit 99.1 T-Mobile Announces Proposed Public Offering of Senior Notes September 11, 2023 BELLEVUE, Wash.—(BUSINESS WIRE)—T-Mobile US, Inc. (NASDAQ: TMUS) (“T-Mobile”) announced today that T-Mobile USA, Inc., its direct wholly-owned subsidiary (“T-Mobile USA” or the “Issuer”), plans to offer, subject to market and other conditions, senior notes (the “notes”) in a registered public offering. T-Mo

T-Mobile USA, Inc. $1,000,000,000 5.750% Senior Notes due 2034 $1,000,000,000 6.000% Senior Notes due 2054

TABLE OF CONTENTS Filed Pursuant to Rule 424(b)(5) File No. 333-271553 PROSPECTUS SUPPLEMENT (To Prospectus dated May 1, 2023) $2,000,000,000   T-Mobile USA, Inc. $1,000,000,000 5.750% Senior Notes due 2034 $1,000,000,000 6.000% Senior Notes due 2054 T-Mobile USA, Inc., a Delaware corporation (“T-Mobile USA” or the “Issuer”) and a direct wholly-owned subsidiary of T-Mobile US, Inc., a Delaware cor

Calculation of Filing Fee Table (Form Type) T-Mobile USA, Inc. American Telecasting of Seattle, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communications LLC

Exhibit 107.1 Calculation of Filing Fee Table 424(b)(5) (Form Type) Issuer: T-Mobile USA, Inc. Guarantors: American Telecasting of Seattle, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communications LLC Clearwire Legacy LLC Clearwire Spectrum Holdings II LLC Clearwire Spectrum Holdings III LLC Clearwire Spe

Pricing Term Sheet T-MOBILE USA, INC. 5.750% Senior Notes due 2034 (the “2034 Notes”) 6.000% Senior Notes due 2054 (the “2054 Notes” and, together with the 2034 Notes, the “Notes”)

Issuer Free Writing Prospectus filed pursuant to Rule 433 supplementing the Preliminary Prospectus Supplement dated September 11, 2023 Registration No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 12, 2023 (September 12,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 12, 2023 (September 12, 2023) T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporat

As filed with the Securities and Exchange Commission on September 11, 2023

As filed with the Securities and Exchange Commission on September 11, 2023 Registration No.

Subject to Completion, dated September 11, 2023

TABLE OF CONTENTS The information in this preliminary prospectus supplement is not complete and may be changed.

Calculation of Filing Fee Table Form S-3 (Form Type) T-Mobile USA, Inc. American Telecasting of Seattle, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communica

Exhibit 107.1 Calculation of Filing Fee Table Form S-3 (Form Type) Issuer: T-Mobile USA, Inc. Guarantors: American Telecasting of Seattle, LLC APC Realty and Equipment Company, LLC Assurance Wireless of South Carolina, LLC Assurance Wireless USA, L.P. ATI Sub, LLC Clearwire Communications LLC Clearwire Legacy LLC Clearwire Spectrum Holdings II LLC Clearwire Spectrum Holdings III LLC Clearwire Spec

Name of Subsidiary

Exhibit 22.1 Obligors From time to time, T-Mobile US, Inc., as a guarantor, and its subsidiaries listed in the following table, may be obligors under debt securities issued by T-Mobile USA, Inc. pursuant to the registration statement to which this list is filed as an exhibit. Name of Subsidiary Jurisdiction of Organization Obligor Type American Telecasting of Seattle, LLC Delaware Guarantor APC Re

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 8, 2023 T-MOBILE US, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 8, 2023 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) Delaware 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 6, 2023 T-MOBILE US, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 6, 2023 T-MOBILE US, INC. (Exact Name of Registrant as Specified in Charter) Delaware 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Numb

SUBJECT: Organizational News

Exhibit 99.1 SUBJECT: Organizational News Team – I am reaching out today to share some important news that I wanted to be sure you heard directly from me. Starting this week, and over the next five weeks, we will be making changes to our organization that will result in the reduction of some positions at the company. These shifts will impact close to 5,000 positions, a little under 7% of our total

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 24, 2023 T-MOBILE US, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 24, 2023 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Nu

Minimum Capacity

Confidential treatment requested by T-Mobile US, Inc. pursuant to 17 CFR 200.83 (“Rule 83”) (TMUS-001) T-Mobile US, Inc. 12920 SE 38th Street Bellevue, Washington 98006 August 7, 2023 Via EDGAR Transmission Office of Technology Division of Corporation Finance U.S. Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Attention: Kathryn Jacobson and Robert Littlepage Re: T-Mobi

Form of Restricted Stock Unit Award Agreement (Time-Vesting) for Executive Officers under the T-Mobile US, Inc. 2023 Incentive Award Plan

EXHIBIT 10.1 T-MOBILE US, INC. 2023 INCENTIVE AWARD PLAN RESTRICTED STOCK UNIT GRANT NOTICE (TIME-VESTING) T-Mobile US, Inc., a Delaware corporation (the “Company”), has granted to the participant listed below (“Participant”) the Restricted Stock Units (the “RSUs”) described in this Restricted Stock Unit Grant Notice (this “Grant Notice”), subject to the terms and conditions of the T-Mobile US, In

Subsidiary Guarantors and Issuers of Guaranteed Securities.

EXHIBIT 22.1 Subsidiary Guarantors and Issuers of Guaranteed Securities Guaranteed Securities The following securities (collectively, the “T-Mobile USA Senior Notes”) issued by T-Mobile USA, Inc., a Delaware corporation and wholly-owned subsidiary of T-Mobile US, Inc. (the “Company”), were outstanding as of June 30, 2023, including those that may no longer be subject to reporting as provided by Re

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 27, 2023 T-MOBILE US, INC. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 27, 2023 T-MOBILE US, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33409 T-MOB

Form of Restricted Stock Unit Award Agreement (Performance-Vesting) (Cash-Settled) for Executive Officers under the T-Mobile US, Inc. 2023 Incentive Award Plan

EXHIBIT 10.3 T-MOBILE US, INC. 2023 INCENTIVE AWARD PLAN RESTRICTED STOCK UNIT GRANT NOTICE (PERFORMANCE-VESTING; CASH-SETTLED) T-Mobile US, Inc., a Delaware corporation (the “Company”), has granted to the participant listed below (“Participant”) the Restricted Stock Units (the “RSUs”) described in this Restricted Stock Unit Grant Notice (this “Grant Notice”), subject to the terms and conditions o

Form of Restricted Stock Unit Award Agreement (Performance-Vesting) (Stock Settled) for Executive Officers under the T-Mobile US, Inc. 2023 Incentive Award Plan

EXHIBIT 10.2 T-MOBILE US, INC. 2023 INCENTIVE AWARD PLAN RESTRICTED STOCK UNIT GRANT NOTICE (PERFORMANCE-VESTING; STOCK-SETTLED) T-Mobile US, Inc., a Delaware corporation (the “Company”), has granted to the participant listed below (“Participant”) the Restricted Stock Units (the “RSUs”) described in this Restricted Stock Unit Grant Notice (this “Grant Notice”), subject to the terms and conditions

T-Mobile Delivers Industry-Leading Growth in Customers and Profitability in Q2 2023, Raises 2023 Guidance Again Un-carrier Reaches Another Milestone with the Lowest Postpaid Phone Churn in the Industry for the First Time Ever, while Delivering the Hi

EXHIBIT 99.1 T-Mobile Delivers Industry-Leading Growth in Customers and Profitability in Q2 2023, Raises 2023 Guidance Again Un-carrier Reaches Another Milestone with the Lowest Postpaid Phone Churn in the Industry for the First Time Ever, while Delivering the Highest Q2 Postpaid Phone Net Adds in Eight Years Industry-Leading Customer Growth Fueled by Network Leadership and Launch of Phone Freedom

Form of Restricted Stock Unit Award Agreement for Non-Employee Directors under the T-Mobile US, Inc. 2023 Incentive Award Plan.

EXHIBIT 10.4 T-MOBILE US, INC. 2023 INCENTIVE AWARD PLAN RESTRICTED STOCK UNIT GRANT NOTICE (TIME-VESTING, NON-AFFILIATED DIRECTOR – ANNUAL AWARD) T-Mobile US, Inc., a Delaware corporation (the “Company”), has granted to the participant listed below (“Participant”) the Restricted Stock Units (the “RSUs”) described in this Restricted Stock Unit Grant Notice (this “Grant Notice”), subject to the ter

3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Merger & Integration 15 Guidance 16 Contacts 17 Financial and Operational Tables

EXHIBIT 99.2 2 3 Highlights 4 Customer Metrics 7 Financial Metrics 13 Capital Structure 14 Merger & Integration 15 Guidance 16 Contacts 17 Financial and Operational Tables 3 (1)AT&T Inc. historically does not disclose postpaid net account additions. Comcast and Charter do not disclose postpaid phone net additions. Industry leading claims are based on consensus expectations if results are not yet r

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 18, 2023 T-MOBILE US, INC. (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 18, 2023 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Numb

James J. Kavanaugh Appointed to T-Mobile US Board of Directors

EX-99.1 EXHIBIT 99.1 James J. Kavanaugh Appointed to T-Mobile US Board of Directors BELLEVUE, Wash. — July 20, 2023—T-Mobile US, Inc. (NASDAQ: TMUS) today announced that finance executive James J. Kavanaugh has been appointed to its Board of Directors, effective July 18, 2023. He will also serve on the board’s Audit Committee, effective August 1, 2023. Kavanaugh’s career in technology and telecomm

* * * *

Confidential treatment requested by T-Mobile US, Inc. pursuant to 17 CFR 200.83 (“Rule 83”)(TMUS-001) T-Mobile US, Inc. 12920 SE 38th Street Bellevue, Washington 98006 July 14, 2023 Via EDGAR Transmission Office of Technology Division of Corporation Finance U.S. Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Attention: Kathryn Jacobson and Robert Littlepage Re: T-Mobile

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 5, 2023 T-MOBILE US, INC. (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 5, 2023 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Numbe

555 Eleventh Street, N.W., Suite 1000

555 Eleventh Street, N.W., Suite 1000 Washington, D.C. 20004-1304 Tel: +1.202.637.2200 Fax: +1.202.637.2201 www.lw.com FIRM / AFFILIATE OFFICES Austin Milan Beijing Munich Boston New York Brussels Orange County July 10, 2023 Century City Paris Chicago Riyadh Dubai San Diego Düsseldorf San Francisco Frankfurt Seoul Hamburg Shanghai Hong Kong Silicon Valley VIA EDGAR Houston Singapore London Tel Avi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 16, 2023 T-MOBILE US, INC. (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 16, 2023 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) DELAWARE 1-33409 20-0836269 (State or other jurisdiction of incorporation) (Commission File Numb

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT THE SECURITIES ACT OF 1933 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) Delaware 20-0836269 (State or other jurisdicti

S-8 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 T-MOBILE US, INC. (Exact name of registrant as specified in its charter) Delaware 20-0836269 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 12920 SE 38th Street Bellevue, Washington 98006 (425) 378-4000 (Ad