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Apple's New Feature Lets Two iPhones Share One eSIM
3 Sep
Summary
- New iOS 27 feature allows seamless switching between two iPhones.
- eSIM number stays the same when transferring cellular service.
- Feature requires carrier support; T-Mobile and Deutsche Telekom may support it.
Apple is developing an iOS 27 feature called iPhone Handoff, which will permit users to transition between two iPhones while maintaining a single eSIM number. This functionality was briefly previewed during WWDC 2026 and has been observed by users on their devices, with video demonstrations circulating.
Users will be able to activate iPhone Handoff within their device settings, choosing which iPhone will retain the primary eSIM and which will receive the companion eSIM. Once configured, only the main iPhone will allow modifications to cellular settings. This feature is expected to be available with the upcoming iPhone 18 Pro and the foldable iPhone.
This new capability extends beyond just cellular service, as an accompanying developer article describes an "iPhone quick switch" for active services, including login credentials and persistent state. This aims to provide a continuous user experience across devices, similar to Apple's original Handoff functionality.
Crucially, the successful implementation of iPhone Handoff is contingent upon carrier support. Reports suggest that T-Mobile in the United States and Deutsche Telekom in Germany are among the carriers likely to support this feature upon its release. Further details are anticipated soon, as the stable version of iOS 27 is expected to launch next week.
