T-Mobile US, Inc. 10-K

Item 9A. Controls and Procedures Evaluation of Disclosure Controls and Procedures We maintain disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) designed to ensure information required to be disclosed in our reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Our disclosure controls are also designed to ensure that information required to be disclosed in the reports we file or submit under the Exchange Act is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure. 119 Table of Contents Under the supervision and with the participation of our management, including our Chief Executive Officer and our Chief Financial Officer, we carried out an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures. Based upon that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of the end of the period covered by this Form 10-K. The certifications required by Section 302 of the Sarbanes-Oxley Act of 2002 are filed as exhibits 31.1 and 31.2 , respectively, to this Form 10-K. Changes in Internal Control over Financial Reporting There were no changes in our internal control over financial reporting during our most recently completed fiscal quarter that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. In the second quarter of 2025, we began the implementation of a new global enterprise resource planning (“ERP”) system. The implementation is expected to occur in phases over the next several years and will replace many of our operating and financial systems. The ERP system is designed to accurately maintain our financial records, support integrated billing, supply chain and other operational functionality, facilitate data analysis and accelerate information reporting to our management team related to the operation of the business. As the phased implementation of the new ERP system continues, we could have changes to our processes and procedures which, in turn, could result in changes to our internal control over financial reporting. As such changes occur, we will evaluate quarterly whether such changes materially affect our internal control over financial reporting. Management’s Annual Report on Internal Control over Financial Reporting Our management is responsible for establishing and maintaining adequate internal control over financial reporting. Internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of our financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. Internal control over financial reporting includes maintaining records that in reasonable detail accurately and fairly reflect our transactions, providing reasonable assurance that transactions are recorded as necessary for preparation of our financial statements in accordance with generally accepted accounting principles, providing reasonable assurance that receipts and expenditures are made in accordance with management authorization, and providing reasonable assurance that unauthorized acquisition, use or disposition of company assets that could have a material effect on our financial statements would be prevented or detected on a timely basis. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with policies and procedures may deteriorate. Management conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework and criteria established in Internal Control – Integrated Framework (2013), issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that our internal control over financial reporting was effective as of December 31, 2025. The effectiveness of our internal control over financial reporting as of December 31, 2025 has been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report herein. Item 9B. Other Information On December 2, 2025 , Claure Mobile LLC, an entity affiliated with Marcelo Claure , a director of the Company, adopted a trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) to sell, subject to certain conditions, up to 1,250,000 shares of the Company’s common stock. The duration of this trading plan is 376 days. On December 4, 2025 , Michael J. Katz , the Company’s Chief Business and Product Officer , adopted a trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) to sell, subject to certain conditions, up to 15,000 shares of the Company’s common stock. The duration of this trading plan is 393 days. Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections Not applicable. 120 Table of Contents PART III. Item 10. Directors, Executive Officers and Corporate Governance We maintain a code of ethics applicable to our Chief Executive Officer, Chief Financial Officer, Chief Accounting Officer, Treasurer, and Controller, which is a “Code of Ethics for Senior Financial Officers” as defined by applicable rules of the SEC. This code is publicly available on our website at investor.t-mobile.com. If we make any amendments to this code other than technical, administrative or other non-substantive amendments, or grant any waivers, including implicit waivers, from a provision of this code we will disclose the nature of the amendment or waiver, its effective date and to whom it applies on our website at investor.t-mobile.com or in a Current Report on Form 8-K filed with the SEC. We have adopted a Policy on Securities Trading that governs the purchase, sale, and/or other dispositions of our securities by directors, officers and employees that is reasonably designed to promote compliance with insider trading laws, rules and regulations and NASDAQ listing standards. A copy of our Policy on Securities Trading is included as Exhibit 19.1 to this report. The remaining information required by this item, including information about our Directors, Executive Officers and Audit Committee will be incorporated by reference from our definitive Proxy Statement to be filed with the SEC pursuant to Regulation 14A or will be included in an amendment to this Report. Item 11. Executive Compensation The information required by this item will be incorporated by reference from our definitive Proxy Statement to be filed with the SEC pursuant to Regulation 14A or will be included in an amendment to this Report. Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters The information required by this item will be incorporated by reference from our definitive Proxy Statement to be filed with the SEC pursuant to Regulation 14A or will be included in an amendment to this Report. Item 13. Certain Relationships and Related Transactions, and Director Independence The information required by this item will be incorporated by reference from our definitive Proxy Statement to be filed with the SEC pursuant to Regulation 14A or will be included in an amendment to this Report. Item 14. Principal Accountant Fees and Services The information required by this item will be incorporated by reference from our definitive Proxy Statement to be filed with the SEC pursuant to Regulation 14A or will be included in an amendment to this Report. PART IV. Item 15. Exhibits and Financial Statement Schedules (a) Documents filed as a part of this Form 10-K 1. Financial Statements The following financial statements are included in Part II, Item 8 of this Form 10-K: Report of Independent Registered Public Accounting Firm ( PCAOB ID: 34 ) Consolidated Balance Sheets Consolidated Statements of Comprehensive Income Consolidated Statements of Cash Flows Consolidated Statement of Stockholders’ Equity Notes to the Consolidated Financial Statements 121 Table of Contents 2. Financial Statement Schedules All other schedules have been omitted because they are not required, not applicable or the required information is otherwise included. 3. Exhibits See the Index to Exhibits immediately following “Item 16. Form 10-K Summary” of this Form 10-K. Item 16. Form 10–K Summary None . 122 Table of Contents INDEX TO EXHIBITS Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 2.1 Business Combination Agreement, dated as of April 29, 2018, by and among T-Mobile US, Inc., Huron Merger Sub LLC, Superior Merger Sub Corporation, Sprint Corporation, Starburst I, Inc., Galaxy Investment Holdings, Inc., and for the limited purposes set forth therein, Deutsche Telekom AG, Deutsche Telekom Holding B.V. and SoftBank Group Corp. 8-K 4/30/2018 2.1 2.2 Amendment No. 1, dated as of July 26, 2019, to the Business Combination Agreement, dated as of April 29, 2018, by and among T-Mobile US, Inc., Huron Merger Sub LLC, Superior Merger Sub Corporation, Sprint Corporation, Starburst I, Inc., Galaxy Investment Holdings, Inc., and for the limited purposes set forth therein, Deutsche Telekom AG, Deutsche Telekom Holding B.V., and SoftBank Group Corp. 8-K 7/26/2019 2.2 2.3 Amendment No. 2, dated as of February 20, 2020, to the Business Combination Agreement, dated as of April 29, 2018, by and among T-Mobile US, Inc., Huron Merger Sub LLC, Superior Merger Sub Corporation, Sprint Corporation, Starburst I, Inc., Galaxy Investment Holdings, Inc., and for the limited purposes set forth therein, Deutsche Telekom AG, Deutsche Telekom Holding B.V., and SoftBank Group Corp. 8-K 2/20/2020 2.1 2.4* Membership Interest Purchase Agreement, dated as of September 6, 2022, by and among Sprint LLC, Sprint Communications LLC, and Cogent Infrastructure, Inc. 8-K 9/7/2022 2.1 3.1 Fifth Amended and Restated Certificate of Incorporation of T-Mobile US, Inc. 8-K 4/1/2020 3.1 3.2 Seventh Amended and Restated Bylaws of T-Mobile US, Inc. 8-K 4/1/2020 3.2 4.1 Indenture, dated as of April 28, 2013 among T-Mobile USA, Inc., the guarantors party thereto, and Deutsche Bank Trust Company Americas, as trustee. 8-K 5/2/2013 4.1 4.2 Eleventh Supplemental Indenture, dated as of May 1, 2013 among T-Mobile USA, Inc., the guarantors party thereto, and Deutsche Bank Trust Company Americas, as trustee. 8-K 5/2/2013 4.12 4.3 Sixteenth Supplemental Indenture, dated as of August 11, 2014, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee. 10-Q 10/28/2014 4.3 4.4 Nineteenth Supplemental Indenture, dated as of September 28, 2015, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee. 10-Q 10/27/2015 4.3 4.5 Thirty-Third Supplemental Indenture, dated as of January 25, 2018, by and among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, including the Form of 4.750% Senior Note due 2028. 8-K 1/25/2018 4.2 4.6 Thirty-Sixth Supplemental Indenture, dated as of April 30, 2018, by and among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, including the Form of 4.750% Senior Note due 2028-1. 8-K 5/4/2018 4.2 4.7 T hirty-Seventh Supplemental Indenture, dated as of May 20, 2018, by and among T-Mobile USA, Inc., the guarantors party thereto, and Deutsche Bank Trust Company Americas. 8-K 5/21/2018 4.1 4.8 Thirty-Eighth Supplemental Indenture, dated as of December 20, 2018, by and among T-Mobile USA, Inc., the guarantors party thereto, and Deutsche Bank Trust Company Americas. 8-K 12/21/2018 4.1 123 Table of Contents Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 4.9 Fortieth Supplemental Indenture, dated as of September 27, 2019, by and among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee. 10-Q 10/28/2019 4.1 4.10 Forty-First Supplemental Indenture, dated as of April 1, 2020, by and among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto, and Deutsche Bank Trust Company Americas, as trustee. 10-Q 8/6/2020 4.12 4.11 Forty-Third Supplemental Indenture, dated as of January 14, 2021, by and among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, including the Form of 2.250% Senior Note due 2026. 8-K 1/14/2021 4.2 4.12 Forty-Fourth Supplemental Indenture, dated as of January 14, 2021, by and among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, including the Form of 2.625% Senior Note due 2029. 8-K 1/14/2021 4.3 4.13 Forty-Fifth Supplemental Indenture, dated as of January 14, 2021, by and among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, including the Form of 2.875% Senior Note due 2031. 8-K 1/14/2021 4.4 4.14 Forty-Sixth Supplemental Indenture, dated as of March 23, 2021, by and among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, including the Form of 2.625% Senior Note due 2026. 8-K 3/23/2021 4.2 4.15 Forty-Seventh Supplemental Indenture, dated as of March 23, 2021, by and among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.375% Senior Note due 2029. 8-K 3/23/2021 4.3 4.16 Forty-Eighth Supplemental Indenture, dated as of March 23, 2021, by and among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.500% Senior Note due 2031. 8-K 3/23/2021 4.4 4.17 Forty-Ninth Supplemental Indenture, dated as of March 30, 2021, by and among T-Mobile USA, Inc., the guarantors party thereto, and Deutsche Bank Trust Company Americas, as trustee. 10-Q 8/3/2021 4.3 4.18 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. 10-Q 7/31/2024 4.4 4.19 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. 10-Q 4/24/2025 4.9 4.20 Fifty-Second Supplemental Indenture, dated as of August 11, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee. 10-Q 10/23/2025 4.7 4.21 Fifty-Third Supplemental Indenture, dated as of December 31, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee. X 4.22 Indenture, dated as of April 9, 2020 by and among T-Mobile USA, Inc., T-Mobile US, Inc. and Deutsche Bank Trust Company Americas, as trustee. 8-K 4/13/2020 4.1 124 Table of Contents Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 4.23 Second Supplemental Indenture, dated as of April 9, 2020, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.750% Senior Secured Note due 2027. 8-K 4/13/2020 4.3 4.24 Third Supplemental Indenture, dated as of April 9, 2020, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.875% Senior Secured Note due 2030 . 8-K 4/13/2020 4.4 4.25 Fourth Supplemental Indenture, dated as of April 9, 2020, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 4.375% Senior Secured Note due 2040 . 8-K 4/13/2020 4.5 4.26 Fifth Supplemental Indenture, dated as of April 9, 2020, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 4.500% Senior Secured Note due 2050. 8-K 4/13/2020 4.6 4.27 Seventh Supplemental Indenture, dated as of June 24, 2020 by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 1.500% Senior Secured Note due 2026. 8-K 6/26/2020 4.2 4.28 Eighth Supplemental Indenture, dated as of June 24, 2020, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 2.050% Senior Secured Note due 2028. 8-K 6/26/2020 4.3 4.29 Ninth Supplemental Indenture, dated as of June 24, 2020, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 2.550% Senior Secured Note due 2031. 8-K 6/26/2020 4.4 4.30 Tenth Supplemental Indenture, dated as of October 6, 2020, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee. 8-K 10/6/2020 4.4 4.31 Eleventh Supplemental Indenture, dated as of October 6, 2020, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee. 8-K 10/6/2020 4.5 4.32 Twelfth Supplemental Indenture, dated as of October 6, 2020, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.000% Senior Secured Note due 2041. 8-K 10/6/2020 4.6 4.33 Thirteenth Supplemental Indenture, dated as of October 6, 2020, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.300% Senior Secured Note due 2051. 8-K 10/6/2020 4.7 4.34 Fourteenth Supplemental Indenture, dated as of October 28, 2020, by and among T Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 2.250% Senior Secured Note due 2031. 8-K 10/28/2020 4.4 125 Table of Contents Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 4.35 Fifteenth Supplemental Indenture, dated as of October 28, 2020, by and among T Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee. 8-K 10/28/2020 4.5 4.36 Sixteenth Supplemental Indenture, dated as of October 28, 2020, by and among T‑Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee. 8-K 10/28/2020 4.6 4.37 Seventeenth Supplemental Indenture, dated as of October 28, 2020, by and among T Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.600% Senior Secured Note due 2060. 8-K 10/28/2020 4.7 4.38 Eighteenth Supplemental Indenture, dated as of March 30, 2021, by and among T-Mobile USA, Inc., the guarantors party thereto, and Deutsche Bank Trust Company Americas, as trustee. S-4 3/30/2021 4.19 4.39 Nineteenth Supplemental Indenture, dated as of August 13, 2021, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.400% Senior Secured Note due 2052. 8-K 8/13/2021 4.3 4.40 Twentieth Supplemental Indenture, dated as of August 13, 2021, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee. 8-K 8/13/2021 4.4 4.41 Twenty-First Supplemental Indenture, dated as of December 6, 2021, by and among T‑Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 2.400% Senior Secured Note due 2029. 8-K 12/6/2021 4.3 4.42 Twenty-Second Supplemental Indenture, dated as of December 6, 2021, by and among T‑Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 2.700% Senior Secured Note due 2032. 8-K 12/6/2021 4.4 4.43 Twenty-Third Supplemental Indenture, dated as of December 6, 2021, by and among T‑Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee. 8-K 12/6/2021 4.5 4.44 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. 10-Q 7/31/2024 4.5 4.45 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. 10-Q 4/24/2025 4.8 4.46 Twenty-Sixth Supplemental Indenture, dated as of August 11, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee. 10-Q 10/23/2025 4.6 4.47 Twenty-Seventh Supplemental Indenture, dated as of December 31, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee. X 4.48 Indenture, dated as of September 15, 2022 by and among T-Mobile USA, Inc., T-Mobile US, Inc. and Deutsche Bank Trust Company Americas, as trustee. 8-K 9/15/2022 4.1 126 Table of Contents Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 4.49 First Supplemental Indenture, dated as of September 15, 2022, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.200% Senior Note due 2033. 8-K 9/15/2022 4.2 4.50 Second Supplemental Indenture, dated as of September 15, 2022, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.650% Senior Note due 2053. 8-K 9/15/2022 4.3 4.51 Third Supplemental Indenture, dated as of September 15, 2022, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.800% Senior Note due 2062. 8-K 9/15/2022 4.4 4.52 Fourth Supplemental Indenture, dated as of February 9, 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 4.950% Senior Note due 2028. 8-K 2/9/2023 4.3 4.53 Fifth Supplemental Indenture, dated as of February 9, 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 5.050% Senior Note due 2033. 8-K 2/9/2023 4.4 4.54 Sixth Supplemental Indenture, dated as of February 9, 2023, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee. 8-K 2/9/2023 4.5 4.55 Seventh Supplemental Indenture, dated as of May 11, 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 4.800% Senior Note due 2028. 8-K 5/11/2023 4.3 4.56 Eighth Supplemental Indenture, dated as of May 11, 2023, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee. 8-K 5/11/2023 4.4 4.57 Ninth Supplemental Indenture, dated as of May 11, 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 2054. 8-K 5/11/2023 4.5 4.58 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. 8-K 9/14/2023 4.2 4.59 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. 8-K 9/14/2023 4.3 4.60 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. 8-K 1/12/2024 4.2 4.61 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. 8-K 1/12/2024 4.3 127 Table of Contents Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 4.62 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. 8-K 1/12/2024 4.4 4.63 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. 8-K 5/8/2024 4.2 4.64 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. 8-K 5/8/2024 4.3 4.65 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. 8-K 5/8/2024 4.4 4.66 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. 10-Q 7/31/2024 4.6 4.67 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. 8-K 9/26/2024 4.2 4.68 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. 8-K 9/26/2024 4.3 4.69 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. 8-K 9/26/2024 4.4 4.70 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. 8-K 2/11/2025 4.2 4.71 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. 8-K 2/11/2025 4.3 4.72 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. 8-K 2/11/2025 4.4 4.73 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. POSASR 3/24/2025 4.8 4.74 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. 8-K 3/27/2025 4.2 128 Table of Contents Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 4.75 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. 8-K 3/27/2025 4.3 4.76 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. 8-K 3/27/2025 4.4 4.77 Twenty-Ninth Supplemental Indenture, dated as of August 5, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, relating to T-Mobile USA, Inc.’s 6.700% Senior Notes due 2033. 8-K 8/5/2025 4.2 4.78 Thirtieth Supplemental Indenture, dated as of August 5, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, relating to T-Mobile USA, Inc.’s 6.250% Senior Notes due 2069. 8-K 8/5/2025 4.3 4.79 Thirty-First Supplemental Indenture, dated as of August 5, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, relating to T-Mobile USA, Inc.’s 5.500% Senior Notes due March 2070. 8-K 8/5/2025 4.4 4.80 Thirty-Second Supplemental Indenture, dated as of August 5, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, relating to T-Mobile USA, Inc.’s 5.500% Senior Notes due June 2070. 8-K 8/5/2025 4.5 4.81 Thirty-Third Supplemental Indenture, dated as of August 11, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee. POSASR 10/6/2025 4.9 4.82 Thirty-Fourth Supplemental Indenture, dated as of October 9, 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 4.625% Senior Note due 2033. 8-K 10/9/2025 4.2 4.83 Thirty-Fifth Supplemental Indenture, dated as of October 9, 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 4.950% Senior Note due 2035. 8-K 10/9/2025 4.3 4.84 Thirty-Sixth Supplemental Indenture, dated as of October 9, 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 5.700% Senior Note due 2056. 8-K 10/9/2025 4.4 4.85 Thirty-Seventh Supplemental Indenture, dated as of December 31, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee . POSASR 1/7/2026 4.10 4.86 Thirty-Eighth Supplemental Indenture, dated as of January 12, 2026, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.000% Senior Note due 2036. 8-K 1/12/2026 4.2 129 Table of Contents Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 4.87 Thirty-Ninth Supplemental Indenture, dated as of January 12, 2026, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.850% Senior Note due 2056. 8-K 1/12/2026 4.3 4.88 Indenture, dated as of October 1, 1998, by and among Sprint Capital Corporation, Sprint Corporation and The Bank of New York Mellon Trust Company, N.A. (as successor to Bank One, N.A.) 10-Q (SEC File No. 001-04721) 11/2/1998 4(b) 4.89 First Supplemental Indenture, dated as of January 15, 1999, by and among Sprint Capital Corporation, Sprint Corporation and The Bank of New York Mellon Trust Company, N.A. (as successor to Bank One, N.A.) 8-K (SEC File No. 001-04721) 2/3/1999 4(b) 4.90 Second Supplemental Indenture, dated as of October 15, 2001, by and among Sprint Capital Corporation, Sprint Corporation and The Bank of New York Mellon Trust Company, N.A. (as successor to Bank One, N.A.) 8-K (SEC File No. 001-04721) 10/29/2001 99 4.91 Third Supplemental Indenture, dated as of September 11, 2013, by and among Sprint Corporation, Sprint Capital Corporation, Sprint Communications, Inc. and The Bank of New York Mellon Trust Company, N.A. (as successor to Bank One, N.A.) 8-K (SEC File No. 001-04721) 9/11/2013 4.5 4.92 Fourth Supplemental Indenture, dated as of May 18, 2018, by and among Sprint Capital Corporation, Sprint Communications, Inc., and The Bank of New York Mellon Trust Company, N.A. (as successor to Bank One, N.A.) 8-K (SEC File No. 001-04721) 5/18/2018 4.1 4.93 Fifth Supplemental Indenture, dated as of April 1, 2020, by and among Sprint Capital Corporation, Sprint Communications, Inc., Sprint Corporation, T-Mobile US, Inc., T-Mobile USA, Inc. and The Bank of New York Mellon Trust Company, N.A. (as successor to Bank One, N.A.), as trustee. 10-Q/A 8/10/2020 4.19 4.94 Sixth Supplemental Indenture, dated as of March 17, 2023, by and among Sprint Capital Corporation, Sprint Communications LLC and The Bank of New York Mellon Trust Company, N.A. 8-K 3/20/2023 4.1 4.95 Indenture, dated as of October 27, 2016, by and among Sprint Spectrum Co LLC, Sprint Spectrum Co II LLC, Sprint Spectrum Co III LLC and Deutsche Bank Trust Company Americas, as Trustee and Securities Intermediary. 8-K (SEC File No. 001-04721) 11/2/2016 4.1 4.96 First Supplemental Indenture, dated as of March 12, 2018, by and among Sprint Spectrum Co LLC, Sprint Spectrum Co II LLC, Sprint Spectrum Co III LLC and Deutsche Bank Trust Company Americas, as trustee and securities intermediary. 8-K (SEC File No. 001-04721) 3/12/2018 4.1 4.97 Second Supplemental Indenture, dated as of June 6, 2018, to the Indenture, dated as of October 27, 2016, by and among Sprint Spectrum Co LLC, Sprint Spectrum Co II LLC, Sprint Spectrum Co III LLC and Deutsche Bank Trust Company Americas as trustee. 8-K (SEC File No. 001-04721) 6/6/2018 4.1 4.98 Third Supplemental Indenture, dated as of December 10, 2018, by and among Sprint Spectrum Co LLC, Sprint Spectrum Co II LLC, Sprint Spectrum Co III LLC and Deutsche Bank Trust Company Americas, as trustee and securities intermediary. 10-Q (SEC File No. 001-04721) 1/31/2019 4.1 130 Table of Contents Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 4.99 Series 2018-1 Supplement, dated as of March 21, 2018 by and among Sprint Spectrum Co LLC, Sprint Spectrum Co II LLC, Sprint Spectrum Co III LLC and Deutsche Bank Trust Company Americas, as trustee and securities intermediary. 8-K (SEC File No. 001-04721) 3/21/2018 10.1 4.100 Proxy, Lock-Up and ROFR Agreement, dated as of April 1, 2020, by and between Deutsche Telekom AG and SoftBank Group Corp. 13D 4/2/2020 6 4.101 Description of Securities. X 10.1 Master Agreement, dated as of September 28, 2012, among T-Mobile USA, Inc., Crown Castle International Corp., and certain T-Mobile and Crown subsidiaries. 10-Q 8/8/2013 10.1 10.2 Amendment No. 1, dated as of November 30, 2012, to Master Agreement, dated as of November 30, 2012, among Crown Castle International Corp., and certain T-Mobile and Crown subsidiaries. 10-Q 8/8/2013 10.2 10.3 Settlement and Amendment No. 2, dated as of May 8, 2014, to Master Agreement, dated as of November 2012, among Crown Castle International Corp., and certain T-Mobile and Crown subsidiaries. 10-K 2/7/2019 10.3 10.4 Master Prepaid Lease, dated as of November 30, 2012, by and among T-Mobile USA Tower LLC, T-Mobile West Tower LLC, T-Mobile USA, Inc. and CCTMO LLC. 10-Q 8/8/2013 10.3 10.5 MPL Site Master Lease Agreement, dated as of November 30, 2012, by and among Cook Inlet/VS GSM IV PCS Holdings, LLC, T-Mobile Central LLC, T-Mobile South LLC, Powertel/Memphis, Inc., Voicestream Pittsburgh, L.P., T-Mobile West LLC, T-Mobile Northeast LLC, Wireless Alliance, LLC, Suncom Wireless Operating Company, L.L.C., T-Mobile USA, Inc. and CCTMO LLC. 10-Q 8/8/2013 10.4 10.6 First Amendment, dated as of November 30, 2012, to MPL Site Master Lease Agreement, dated as of November 30, 2012, by and among Cook Inlet/VS GSM IV PCS Holdings, LLC, T-Mobile Central LLC, T-Mobile South LLC, Powertel/Memphis, Inc., Voicestream Pittsburgh, L.P., T-Mobile West LLC, T-Mobile Northeast LLC, Wireless Alliance, LLC, Suncom Wireless Operating Company, L.L.C., T-Mobile USA, Inc. and CCTMO LLC. 10-Q 8/8/2013 10.5 10.7 Second Amendment, dated as of October 31, 2014, to MPL Site Master Lease Agreement, dated as of November 30, 2012, by and among Cook Inlet/VS GSM IV PCS Holdings, LLC, T-Mobile Central LLC, T-Mobile South LLC, Powertel/Memphis, Inc., Voicestream Pittsburgh, L.P., T-Mobile West LLC, T-Mobile Northeast LLC, Suncom Wireless Operating Company, L.L.C., T-Mobile USA, Inc. 10-K 2/7/2019 10.7 10.8 Sale Site Master Lease Agreement, dated as of November 30, 2012, by and among Cook Inlet/VS GSM IV PCS Holdings, LLC, T-Mobile Central LLC, T-Mobile South LLC, Powertel/Memphis, Inc., Voicestream Pittsburgh, L.P., T-Mobile West LLC, T-Mobile Northeast LLC, Wireless Alliance, LLC, Suncom Wireless Operating Company, L.L.C., T-Mobile USA, Inc., T3 Tower 1 LLC and T3 Tower 2 LLC. 10-Q 8/8/2013 10.6 10.9 First Amendment, dated as of November 30, 2012, to Sale Site Master Lease Agreement, dated as of November 30, 2012, by and Cook Inlet/VS GSM IV PCS Holdings, LLC, T-Mobile Central LLC, T-Mobile South LLC, Powertel/Memphis, Inc., Voicestream Pittsburgh, L.P., T-Mobile West LLC, T-Mobile Northeast LLC, Wireless Alliance, LLC, Suncom Wireless Operating Company, L.L.C., T-Mobile USA, Inc., T3 Tower 1 LLC and T3 Tower 2 LLC. 10-Q 8/8/2013 10.7 131 Table of Contents Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 10.10 Second Amendment, dated as of October 31, 2014, to Sale Site Master Lease Agreement, dated as of November 30, 2012, by and Cook Inlet/VS GSM IV PCS Holdings, LLC, T-Mobile Central LLC, T-Mobile South LLC, Powertel/Memphis, Inc., Voicestream Pittsburgh, L.P., T-Mobile West LLC, T-Mobile Northeast LLC, Suncom Wireless Operating Company, L.L.C., T-Mobile USA, Inc., T3 Tower 1 LLC and T3 Tower 2 LLC. 10-K 2/7/2019 10.10 10.11 Settlement Technical Closing Agreement, dated as of October 1, 2014, among Crown Castle International Corp., and certain T-Mobile and Crown subsidiaries. 10-K 2/7/2019 10.11 10.12 Management Agreement, dated as of November 30, 2012, by and among Suncom Wireless Operating Company, L.L.C., Cook Inlet/VS GSM IV PCS Holdings, LLC, T-Mobile Central LLC, T-Mobile South LLC, Powertel/Memphis, Inc., Voicestream Pittsburgh, L.P., T-Mobile West LLC, T-Mobile Northeast LLC, Wireless Alliance, LLC, Suncom Wireless Property Company, L.L.C., T-Mobile USA Tower LLC, T-Mobile West Tower LLC, CCTMO LLC, T3 Tower 1 LLC and T3 Tower 2 LLC. 10-Q 8/8/2013 10.8 10.13 Second Amended and Restated Stockholders’ Agreement, dated as of June 22, 2020, by and among T-Mobile US, Inc., Deutsche Telekom AG and SoftBank Group Corp. S-3ASR 6/22/2020 4.2 10.14 Financing Matters Agreement, dated as of April 29, 2018, by and between T-Mobile USA, Inc. and Deutsche Telekom AG. 8-K 4/30/2018 10.3 10.15 Letter Agreement, dated as of February 20, 2020, by and among T-Mobile US, Inc., Deutsche Telekom AG and SoftBank Group Corp. 8-K 2/20/2020 10.1 10.16 License Agreement dated as of April 30, 2013 by and between T-Mobile US, Inc. and Deutsche Telekom AG. 8-K 5/2/2013 10.2 10.17 Supplemental Agreement, effective as of June 3, 2019, to the License Agreement, dated as of April 30, 2013, by and between T-Mobile US, Inc. and Deutsche Telekom AG. 10-Q 7/26/2019 10.5 10.18 Amendment No. 1, dated as of April 1, 2020, to the License Agreement, dated as of April 30, 2013, by and between T-Mobile US, Inc. and Deutsche Telekom AG. 8-K 4/1/2020 10.3 10.19* Master Network Services Agreement, dated as of July 1, 2020, between T-Mobile USA, Inc., DISH Purchasing Corporation and solely for the purposes of Section 13, DISH Network Corporation. 10-Q 11/5/2020 10.1 10.20 Second Amended and Restated Credit Agreement, dated January 5, 2026, by and among T-Mobile USA, Inc., the lenders, swinglines lenders and L/C issuers party thereto, and JPMorgan Chase Bank, N.A., as administrative agent. 8-K 1/6/2026 10.1 10.21 Guarantee and Collateral Agreement, dated October 27, 2016, among Deutsche Bank Trust Company Americas, Sprint Spectrum PledgeCo LLC, Sprint Spectrum PledgeCo II LLC, Sprint Spectrum PledgeCo III LLC, Sprint Spectrum License Holder LLC, Sprint Spectrum License Holder II LLC and Sprint Spectrum License Holder III LLC. 8-K (SEC File No. 001-04721) 11/2/2016 10.1 10.22 Intra-Company Spectrum Lease Agreement, dated as of October 27, 2016, among Sprint Spectrum License Holder LLC, Sprint Spectrum License Holder II LLC and Sprint Spectrum License Holder III LLC, Sprint Communications, Inc., Sprint Intermediate HoldCo LLC, Sprint Intermediate HoldCo II LLC, Sprint Intermediate HoldCo III LLC and the guarantors. 8-K (SEC File No. 001-04721) 11/2/2016 10.2 132 Table of Contents Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 10.23 First Amendment to Intra-Company Spectrum Lease Agreement, dated as of March 12, 2018, among Sprint Spectrum License Holder, LLC, Sprint Spectrum License Holder II LLC and Sprint Spectrum License Holder III LLC, Sprint Communications, Inc., Sprint Intermediate HoldCo LLC, Sprint Intermediate HoldCo II LLC, Sprint Intermediate HoldCo III LLC. 8-K (SEC File No. 001-04721) 3/12/2018 10.1 10.24 Second Amendment to Intra-Company Spectrum Lease Agreement, dated as of June 6, 2018, among Sprint Spectrum License Holder, LLC, Sprint Spectrum License Holder II LLC and Sprint Spectrum License Holder III LLC, Sprint Communications, Inc., Sprint Intermediate HoldCo LLC, Sprint Intermediate HoldCo II LLC, Sprint Intermediate HoldCo III LLC, Sprint Corporation and the subsidiary guarantors. 8-K (SEC File No. 001-04721) 6/6/2018 10.1 10.25 Guarantee Assumption Agreement, dated as of April 1, 2020, by and among Sprint Spectrum License Holder, LLC, Sprint Spectrum License Holder II LLC, Sprint Spectrum License Holder III LLC, T-Mobile, T-Mobile USA and certain subsidiary guarantors. 10-Q/A 8/10/2020 10.13 10.26 Guarantee Assumption Agreement, dated as of March 30, 2021, by and among Sprint Spectrum License Holder, LLC, Sprint Spectrum License Holder II LLC, Sprint Spectrum License Holder III LLC and certain subsidiary guarantors. 10-Q 8/3/2021 10.3 10.27 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. 10-Q 7/31/2024 10.3 10.28 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. 10-Q 4/24/2025 10.3 10.29 Guarantee Assumption Agreement, dated as of August 11, 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. 10-Q 10/23/2025 10.5 10.30 Guarantee Assumption Agreement, dated as of December 31, 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. X 10.31 Master Framework Agreement, dated as of June 22, 2020, by and among SoftBank Group Corp., SoftBank Group Capital Ltd, Delaware Project 4 L.L.C., Delaware Project 6 L.L.C., Claure Mobile LLC, Deutsche Telekom AG, T-Mobile US, Inc. and T-Mobile Agent LLC. 8-K 6/26/2020 10.1 10.32 Term Sheet, dated as of June 15, 2022, by and between the Company and DISH Network Corporation. 10-Q 7/29/2022 10.1 10.33* 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. 10-Q 4/27/2023 10.3 10.34 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. 10-Q 10/25/2023 10.1 133 Table of Contents Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 10.35* 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. 10-Q 4/27/2023 10.4 10.36 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. 10-Q 10/25/2023 10.2 10.37* 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. 10-Q 4/27/2023 10.5 10.38* 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. 10-Q 4/27/2023 10.6 10.39* 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. 10-Q 10/25/2023 10.4 10.40 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. 10-K 1/31/2025 10.39 10.41* Form of Indemnification and Advancement Agreement. 10-K 2/8/2018 10.76 10.42** T-Mobile US, Inc. 2013 Omnibus Incentive Plan (as amended and restated on August 7, 2013). 10-Q 8/8/2013 10.20 10.43** Amendment to T-Mobile US, Inc. 2013 Omnibus Incentive Plan (as amended and restated on August 7, 2013). Schedule 14A 4/26/2018 Annex A 10.44** T-Mobile US, Inc. 2023 Incentive Award Plan. Schedule 14A 4/28/2023 Annex A 10.45** Form of Annual Incentive Award Notice under the 2023 Incentive Award Plan. X 10.46** Form of Restricted Stock Unit Award Agreement (Time- Based Vesting) for Executive Officers under the T-Mobile US, Inc. 2013 Omnibus Incentive Plan. 10-Q 5/6/2020 10.7 10.47** Form of Restricted Stock Unit Award Agreement (Performance- Based Vesting) (Stock Settled) for Executive Officers under the T-Mobile US, Inc. 2013 Omnibus Incentive Plan. 10-Q 5/6/2020 10.8 10.48** Form of Restricted Stock Unit Award Agreement (Performance- Based Vesting) (Cash Settled) for Executive Officers under the T-Mobile US, Inc. 2013 Omnibus Incentive Plan. 10-Q 5/4/2021 10.3 10.49** Form of Restricted Stock Unit Award Agreement (Time- Based Vesting) for Executive Officers under the T-Mobile US, Inc. 2023 Incentive Award Plan. X 10.50** Form of Restricted Stock Unit Award Agreement (Performance- Based Vesting) (Stock Settled) for Executive Officers under the T-Mobile US, Inc. 2023 Incentive Award Plan. X 10.51** Form of Restricted Stock Unit Award Agreement (Performance- Based Vesting) (Cash-Settled) for Executive Officers under the T-Mobile US, Inc. 2023 Incentive Award Plan. X 134 Table of Contents Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 10.52** Form of LTI Award Letter Agreement . 10-Q 4/24/2025 10.1 10.53** Form of PRSU Award Agreement (Transformation Award). 10-Q 7/23/2025 10.1 10.54** 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). 10-Q 7/23/2025 10.2 10.55** Form of Restricted Stock Unit Award Agreement for Non-Employee Directors under the T-Mobile US, Inc. 2013 Omnibus Incentive Plan. 8-K 6/4/2013 10.2 10.56** Form of Restricted Stock Unit Award Agreement for Non-Employee Directors under the T-Mobile US, Inc. 2023 Incentive Award Plan. 10-Q 7/27/2023 10.4 10.57** T-Mobile US, Inc. Amended and Restated 2014 Employee Stock Purchase Plan. Schedule 14A 4/28/2023 Annex B 10.58** Amended and Restated T-Mobile US, Inc. Non-Qualified Deferred Executive Compensation Plan. 10-Q 7/31/2024 10.2 10.59** T-Mobile US, Inc. Executive Continuity Plan as Amended and Restated Effective as of January 1, 2014. 8-K 10/25/2013 10.1 10.60** Amended and Restated Employment Agreement, dated as of September 19, 2025, by and between the Company and Srinivasan Gopalan . 10-Q 10/23/2025 10.1 10.61** Amended and Restated Employment Agreement, dated as of March 9, 2023, by and between the Company and G. Michael Sievert. 10-Q 4/27/2023 10.2 10.62** Amendment, dated as of September 19, 2025, to Amended and Restated Employment Agreement, dated as of March 9, 2023, by and between the Company and G. Michael Sievert. 10-Q 10/23/2025 10.2 10.63** Compensation Term Sheet, dated as of March 18, 2025, by and between T-Mobile US, Inc. and Michael J. Katz. 10-Q 4/24/2025 10.2 10.64** Amendment, dated as of September 19, 2025, to Compensation Term Sheet, dated as of March 18, 2025, by and between T-Mobile US, Inc. and Michael J. Katz. 10-Q 10/23/2025 10.4 10.65** Employment Agreement, effective October 11, 2021, between T-Mobile US, Inc. and Mark Nelson. 10-Q 5/6/2022 10.1 10.66** Compensation Term Sheet, dated as of September 12, 2024, by and between T-Mobile US, Inc. and Peter Osvaldik. 10-Q 10/23/2024 10.1 10.67** Amendment, dated as of September 19, 2025, to Compensation Term Sheet, dated as of September 12, 2024, by and between T-Mobile US, Inc. and Peter Osvaldik. 10-Q 10/23/2025 10.3 10.68** Letter Agreement, dated as of December 8, 2025, by and between T-Mobile US, Inc. and Jonathan A. Freier. X 10.69** Form of Retirement Agreement. X 19.1 T-Mobile US, Inc. Policy on Securities Trading . 10-K 1/31/2025 19.1 19.2 Frequently Asked Questions Rule 10b5-1 Trading Plans . 10-K 1/31/2025 19.2 21.1 Subsidiaries of Registrant. X 22.1 List of Guarantor Subsidiaries. X 23.1 Consent of Deloitte & Touche LLP. X 24.1 Power of Attorney, pursuant to which amendments to this Form 10-K may be filed (included on the signature page contained in Part IV of the Form 10-K). X 31.1 Certifications of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. X 31.2 Certifications of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. X 135 Table of Contents Incorporated by Reference Exhibit No. Exhibit Description Form Date of Filing Exhibit Number Included Herewith 32.1*** Certification of Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. X 32.2*** Certification of Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. X 97.1 T-Mobile US, Inc. Amended and Restated Executive Incentive Compensation Recoupment Policy. 10-K 2/2/2024 97.1 101.INS XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document. X 101.SCH XBRL Taxonomy Extension Schema Document. X 101.CAL XBRL Taxonomy Extension Calculation Linkbase Document. X 101.DEF XBRL Taxonomy Extension Definition Linkbase Document. X 101.LAB XBRL Taxonomy Extension Label Linkbase Document. X 101.PRE XBRL Taxonomy Extension Presentation Linkbase Document. X 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document). * Certain confidential information contained in this exhibit has been omitted because it is both (i) not material and (ii) would likely cause competitive harm if publicly disclosed. ** Indicates a management contract or compensatory plan or arrangement. *** Furnished herewith. Certain instruments defining the rights of holders of long-term debt securities of the registrant and its consolidated subsidiaries are omitted pursuant to Item 601(b)(4)(iii)(A) of Regulation S-K. The registrant hereby undertakes to furnish to the SEC, upon request, copies of any such instruments. 136 Table of Contents SIGNATURES Pursuant to the requirements of the Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. T-MOBILE US, INC. February 11, 2026 /s/ Srinivasan Gopalan Srinivasan Gopalan Chief Executive Officer Each person whose signature appears below constitutes and appoints Srinivasan Gopalan and Peter Osvaldik, and each or any of them, his or her true and lawful attorney-in-fact and agent, each acting alone, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any or all amendments or supplements (including post-effective amendments) to this Report, and to file the same, with all exhibits thereto, and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof. Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities indicated as of February 11, 2026. Signature Title /s/ Srinivasan Gopalan Chief Executive Officer and Srinivasan Gopalan Director (Principal Executive Officer) /s/ Peter Osvaldik Chief Financial Officer Peter Osvaldik (Principal Financial Officer) /s/ Daniel J. Drobac Vice President and Chief Accounting Officer Daniel J. Drobac (Principal Accounting Officer) /s/ Timotheus Höttges Chairman of the Board Timotheus Höttges /s/ G. Michael Sievert Vice Chairman and Vice Chairman of the Board G. Michael Sievert /s/ Marcelo Claure Director Marcelo Claure /s/ Srikant M. Datar Director Srikant M. Datar /s/ Thomas Dannenfeldt Director Thomas Dannenfeldt 137 Table of Contents /s/ Christian P. Illek Director Christian P. Illek /s/ James J. Kavanaugh Director James J. Kavanaugh /s/ Raphael Kübler Director Raphael Kübler /s/ Thorsten Langheim Director Thorsten Langheim /s/ Dominique Leroy Director Dominique Leroy /s/ Letitia A. Long Director Letitia A. Long /s/ Abdurazak Mudesir Director Abdurazak Mudesir /s/ Teresa A. Taylor Director Teresa A. Taylor 138