T-Mobile’s Q3 2026 service revenues, which exclude equipment sales and typically comprise roughly 83% of total revenue, are shaped by postpaid phone and broadband net additions, postpaid ARPA growth of 2.5–3.0% guided for the year, and prepaid/wholesale trends. The company reported $18.983 billion in service revenues for Q2 2026, up 8.9% year-over-year, supported by 1.2 million postpaid net account additions in 2025 and sustained momentum into 2026. Full-year 2026 service revenue guidance stands at approximately $77 billion, implying a quarterly run rate near $19.25 billion after $37.814 billion in the first half. Analysts project total Q3 revenue around $22.3–23.6 billion, with service revenue likely tracking prior-quarter momentum ahead of the October 28 earnings release. Key variables include subscriber churn, competitive intensity from Verizon and AT&T, and any impact from recent hurricane recovery efforts or macroeconomic pressures on consumer spending.