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100 F Street, N.E.

Washington, DC 20549

Attn: Kathryn Jacobson and Robert Littlepage

____________________

Re: T-Mobile US, Inc.

Form 10-K for the Year Ended December 31, 2022

Filed February 14, 2023

File No. 001-33409

Dear Ms. Jacobson and Mr. Littlepage:

On behalf of our client, T-Mobile US, Inc. (the “Company”), this letter confirms my telephone conversation with you on April 12, 2023 regarding the Company’s request for an extension of time to respond to the comment letter dated April 11, 2023 from the Staff of the Division of Corporation Finance.

As discussed, the Company requires additional time to prepare its response and currently expects to respond on or about May 9, 2023.

Please contact me at (202) 637-1073 if you have any questions regarding this matter.

Sincerely,

/s/ Julia A Thompson

Julia A Thompson

of LATHAM & WATKINS LLP

Cc: Peter Osvaldik, Executive Vice President & Chief Financial Officer

Mark Nelson, Executive Vice President & General Counsel

Broady Hodder, Corporate Secretary & Senior Vice President, Legal Affairs