Double-Digit Growth in Subscribers and Service Revenue... T-Mobile's Surge Led by Network Leadership

T-Mobile US, Inc. (NASDAQ: TMUS) reported that industry-leading net additions in postpaid, broadband and 5G broadband subscribers drove its Q4 2025 service revenues up 10% year-over-year to $18.7 billion (roughly KRW 24 trillion) and full-year service revenues up 8% to $71.3 billion (roughly KRW 93 trillion). The company said net income, core adjusted EBITDA and free cash flow all rose in 2025, and it issued guidance for further growth in postpaid net additions, core adjusted EBITDA, operating cash flow and free cash flow in 2026. T-Mobile also reaffirmed top-tier network quality rankings from J.D. Power, Opensignal and Ookla, highlighting its network leadership and continued focus on returning value to shareholders.

In a detailed filing released the same day, T-Mobile said its Q4 revenues and earnings per share modestly beat market expectations, and it guided for double-digit year-over-year growth in core adjusted EBITDA and free cash flow in 2026. The company also announced plans to beta-launch in spring 2026 a network-based AI live-translation service offering real-time translation in over 50 languages during calls, part of its ongoing effort to differentiate its service portfolio.

T-Mobile is a leading U.S. wireless carrier operating under the T-Mobile, Metro by T-Mobile and Mint Mobile brands on its nationwide 5G network. Leveraging its “Un-carrier” strategy, the company differentiates itself through unique pricing and service terms. While the U.S. wireless market has matured with limited subscriber growth potential, competition is intensifying to diversify revenue streams through 5G, in-home broadband and satellite-connected services.