Apple's iOS 27 introduces iPhone Handoff, a feature allowing one phone number to be used across two separate iPhones, though not simultaneously. T-Mobile has become the first US carrier to support the feature, pricing it at $5 per month. Verizon confirmed it will bring iPhone Handoff to customers by year-end.

AT&T remains the sole holdout, explicitly declining to offer the service. An AT&T spokesperson stated the carrier's focus remains on delivering innovations that keep customers connected with confidence, pointing to existing eSIM activation and transfer options as alternatives. For AT&T customers waiting for iPhone Handoff, the carrier's stance offers little optimism regarding future adoption.

The feature streamlines the process of switching eSIMs between devices, though AT&T maintains its current ecosystem suffices for customer needs.