T-Mobile US, Inc. Q3 2026 Earnings Recap

T-Mobile’s results were mixed-to-positive, with 9% postpaid service revenue growth and 11% core adjusted EBITDA growth, alongside continued customer additions. Shares slipped 0.5% after earnings, a roughly flat reaction that does not indicate a sharp market disappointment.

Key Takeaways

• Added 274,000 postpaid net accounts and led the industry in postpaid phone and 5G broadband net additions; postpaid ARPA grew more than 4% year over year.
• Postpaid service revenue rose 9%, total service revenue 6%, and core adjusted EBITDA 11%; adjusted free cash flow margin was 26%.
• T-Life reached 32 million monthly active users; more than 80% of upgrades and half of phone line activations were completed digitally.
• T-Mobile for Business recorded its 17th consecutive quarter of positive ports and double-digit year-over-year revenue growth.
• Management said 5G broadband customer growth is tracking ahead of the pace toward 15 million by decade-end; fiber penetration was approximately 20% after 12 months, with customer growth accelerating sequentially and year over year.