iPhone Handoff in iOS 27: one number on two iPhones, T-Mobile only for now

iOS 27 introduces iPhone Handoff, letting users share one phone number across two iPhones, with the number active only on the unlocked device. T-Mobile is the only US carrier supporting it so far, charging $5 a month; Verizon will add it by the end of 2026, while AT&T has not committed.

• T-Mobile is the only US carrier with iPhone Handoff, at $5 per month
• Verizon will add support by the end of 2026; AT&T has not committed
• A single eSIM is assigned to both iPhones, active on the unlocked one
• Requires iOS 27+, the same Apple Account and setup via Settings → Cellular