Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-271553 and 333-271557 on Form S-3 and Registration Statement Nos. 333-189095, 333-202176, 333-225699, 333-236724, 333-237780, 333-237781, 333-253929 and 333-272719 on Form S-8 of our reports dated February 2, 2024, relating to the consolidated financial statements of T-Mobile US, Inc. and the effectiveness of T-Mobile US, Inc.’s internal control over financial reporting appearing in this Annual Report on Form 10-K for the year ended December 31, 2023.

/s/ Deloitte & Touche LLP

Seattle, Washington

February 2, 2024