0001140361-23-005527 Sample Contracts

4.950% SENIOR NOTES DUE 2028 FOURTH SUPPLEMENTAL INDENTURE Dated as of February 9, 2023 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022

Fourth Supplemental Indenture • February 9th, 2023 • T-Mobile US, Inc. • Radiotelephone communications • New York

• Contract Type
  Fourth Supplemental Indenture
• Filed
  February 9th, 2023
• Company
  T-Mobile US, Inc.
• Industry
  Radiotelephone communications
• Jurisdiction
  New York

FOURTH SUPPLEMENTAL INDENTURE (this “Fourth Supplemental Indenture”), dated as of February 9, 2023 (the “Series Issue Date”), among T-Mobile USA, Inc., a Delaware corporation (the “Issuer”), T-Mobile, US, Inc., a Delaware corporation (“Parent,” as a guarantor), and the other guarantors party hereto (together with Parent, the “Guarantors”) and Deutsche Bank Trust Company Americas, a New York banking corporation, as Trustee.

5.650% SENIOR NOTES DUE 2053 SIXTH SUPPLEMENTAL INDENTURE Dated as of February 9, 2023 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022

Sixth Supplemental Indenture • February 9th, 2023 • T-Mobile US, Inc. • Radiotelephone communications • New York

• Contract Type
  Sixth Supplemental Indenture
• Filed
  February 9th, 2023
• Company
  T-Mobile US, Inc.
• Industry
  Radiotelephone communications
• Jurisdiction
  New York

SIXTH SUPPLEMENTAL INDENTURE (this “Sixth Supplemental Indenture”), dated as of February 9, 2023 (the “Additional Notes Issue Date”), among T-Mobile USA, Inc., a Delaware corporation (the “Issuer”), T-Mobile, US, Inc., a Delaware corporation (“Parent,” as a guarantor), and the other guarantors party hereto (together with Parent, the “Guarantors”) and Deutsche Bank Trust Company Americas, a New York banking corporation, as Trustee.

5.050% SENIOR NOTES DUE 2033 FIFTH SUPPLEMENTAL INDENTURE Dated as of February 9, 2023 DEUTSCHE BANK TRUST COMPANY AMERICAS as Trustee to INDENTURE Dated as of September 15, 2022

Fifth Supplemental Indenture • February 9th, 2023 • T-Mobile US, Inc. • Radiotelephone communications • New York

• Contract Type
  Fifth Supplemental Indenture
• Filed
  February 9th, 2023
• Company
  T-Mobile US, Inc.
• Industry
  Radiotelephone communications
• Jurisdiction
  New York

FIFTH SUPPLEMENTAL INDENTURE (this “Fifth Supplemental Indenture”), dated as of February 9, 2023 (the “Series Issue Date”), among T-Mobile USA, Inc., a Delaware corporation (the “Issuer”), T-Mobile, US, Inc., a Delaware corporation (“Parent,” as a guarantor), and the other guarantors party hereto (together with Parent, the “Guarantors”) and Deutsche Bank Trust Company Americas, a New York banking corporation, as Trustee.