144 0001886089 XXXXXXXX LIVE 0001283699 T-Mobile US, Inc. 001-33409 12920 SE 38TH STREET BELLEVUE WA 98006 800-318-9270 Nelson Mark Wolfe Officer Common Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

2330 517969.08 1101862739 02/24/2026 NASDAQ Common 03/28/2024 ESPP Purchase Issuer N 179 03/28/2024 Cash Common 10/11/2024 Restricted Stock Vesting Issuer N 2027 10/11/2024 Compensation Common 03/31/2025 ESPP Purchase Issuer N 122 03/31/2025 Cash Common 02/15/2026 Restricted Stock Vesting Issuer N 2 02/15/2026 Compensation N Mark Nelson

12920 SE 38th Street Bellevue WA 98006-135

Common 02/17/2026 10240 2260992.00 Mark Nelson

12920 SE 38th Street Bellevue WA 98006-135

Common 02/18/2026 6274 1378335.06 02/24/2026 /s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mark Nelson