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

T-Mobile US, Inc. (NASDAQ: TMUS) (the “Company”) today announced, together with T-Mobile USA, Inc., its wholly-owned subsidiary (“T-Mobile USA”), the preliminary results of its previously announced offers to exchange (the “Exchange Offers”) any and all of certain outstanding senior notes of United States Cellular Corporation (“USCC”). The Exchange Offers were launched pursuant to the Securities Purchase Agreement announced on May 28, 2024, under which the Company has agreed to purchase certain assets from USCC.

Today’s preliminary results concern the Company’s offers to exchange:

(i) USCC’s 6.700% Senior Notes due 2033 (the “Old USCC 2033 Notes”) for new 6.700% Senior Notes due 2033 to be issued by T-Mobile USA (the “New 2033 Notes”);

(ii) USCC’s 6.250% Senior Notes due 2069 (the “Old USCC 2069 Notes”) for new 6.250% Senior Notes due 2069 to be issued by T-Mobile USA (the “New 2069 Notes”);

(iii) USCC’s 5.500% Senior Notes due 2070 (March) (the “Old USCC March 2070 Notes”) for new 5.500% Senior Notes due March 2070 to be issued by T-Mobile USA (the “New March 2070 Notes”); and

(iv) USCC’s 5.500% Senior Notes due 2070 (June) (the “Old USCC June 2070 Notes” and, together with the Old USCC 2033 Notes, the Old USCC 2069 Notes and the Old USCC March 2070 Notes, the “Old USCC Notes”) for new 5.500% Senior Notes due June 2070 to be issued by T-Mobile USA (the “New June 2070 Notes” and, collectively with the New 2033 Notes, the New 2069 Notes and New March 2070 Notes, the “New T-Mobile Notes”);

in each case upon the terms and subject to the conditions set forth in the Prospectus, as defined below. In connection with the Exchange Offers, the Company and T-Mobile USA are also soliciting consents to amend the applicable indentures governing each series of the Old USCC Notes (the “Consent Solicitations”) to modify or eliminate certain notice requirements and restrictive covenants in the indentures governing the Old USCC Notes (the “Proposed Amendments”).

As of 5:00 p.m., New York City time, on June 13, 2025, which was the early participation date (the “Early Participation Date”) for the Exchange Offers and the Consent Solicitations, the principal amounts of the Old USCC Notes validly tendered and not validly withdrawn, as advised by D.F. King & Co., Inc., the exchange agent for the Exchange Offers, are set forth in the table below: