TMUS · 8-K · 20261028PR000128

Customer Dynamics

T-Mobile US, Inc. · 2026-10-28 · Importance 40 · Surprise 56

T-Mobile added 274,000 postpaid accounts in Q3 2026, down 30.8% from 396,000 in Q3 2025 and slightly below 277,000 in Q2 2026. Total postpaid accounts reached 34.974 million, up 2.9% year over year. Postpaid account churn was 1.09%, compared with 0.97% in Q3 2025, while postpaid ARPA increased 4.2% year over year to $155.73.

Key facts

• T-Mobile acquired 1.448 million postpaid accounts through the UScellular acquisition in Q3 2025, including base adjustments to align UScellular and T-Mobile policies. source
• T-Mobile acquired 633,000 postpaid accounts from Metronet and other acquisitions in Q3 2025. source
• T-Mobile acquired 85,000 postpaid accounts from Lumos in Q2 2025. source
• T-Mobile added 274,000 postpaid accounts in Q3 2026; total postpaid accounts were 35.0 million, up 3% year over year. source
• T-Mobile's postpaid net account additions totaled 768,000 for the nine months ended September 30, 2026, compared with 919,000 in the comparable 2025 period. source
• Metronet agreed in Q2 2026 to repurchase certain customer accounts, resulting in a 16,000-account decrease to T-Mobile's postpaid account base adjustment. source
• T-Mobile's Q3 2026 postpaid net account additions were 274,000, compared with 277,000 in Q2 2026 and 396,000 in Q3 2025. source
• T-Mobile's postpaid account churn was 1.09% in Q3 2026, 0.99% in Q2 2026, and 0.97% in Q3 2025. source