T-Mobile US (TMUS) Stock Forecast & Price Target

T-Mobile US is supported by a rare combination of scale, network quality, and monetization power, with roughly 88 million postpaid and 25 million prepaid phone customers plus about 9 million fixed-wireless broadband customers, giving it broad reach across wireless and home connectivity. The third-party excerpts also show clear fundamental momentum: 3Q26 total revenue of $23.150 billion, core adjusted EBITDA of $9.620 billion, free cash flow of $5.071 billion, and postpaid account net adds of 274K, while postpaid ARPA rose 4.2% and service revenue grew 6.2%. That mix of industry-leading subscriber growth, rising pricing power, strong cash conversion, and a balance sheet that provides flexibility for spectrum and network investment underpins the positive outlook.

T-Mobile US is facing persistent weakness in prepaid and wholesale, with both revenues down 7.5% y/y and management blaming prepaid customer migration to postpaid plus a faster Boost Mobile wind down. Those trends suggest service revenue could disappoint more than expected into '27, while postpaid phone churn may rise above peer averages and ARPU could come under pressure as customers seek better value. The company also still carries integration risk from the Sprint merger and faces competitive pressure from larger, more scalable rivals, which could weigh on synergies, margins, and execution.