T-Mobile Delivers Strong Account and ARPA Growth, Translating into Industry-Leading Service Revenue, Profitability and EPS Growth

Q3 Results Demonstrate the Un-carrier's Widening Differentiation, with Best Network, Best Value and Best Experiences Deepening Customer Relationships and Driving Industry-Leading Financial Results BELLEVUE, Wash., October 28, 2026--(BUSINESS WIRE)--T-Mobile US, Inc. (NASDAQ: TMUS): Continued Strong Account Growth and Deepening Customer Relationships Fueled by Widening Differentiation Postpaid Average Revenue Per Account ("ARPA") of $155.73 grew 4% year-over-year Postpaid net account additions of 274 thousand, with total postpaid accounts of 35.0 million up 3% year-over-year Translating Strong Account Growth into Durable and Profitable Financial Growth Service revenues of $19.