Apple’s upcoming iOS 27 is set to introduce a feature called “iPhone Handoff” that lets users switch between two iPhones while using the same phone number. The idea is described as similar to an eSIM-style companion setup, allowing a primary device and a companion device to share cellular access for that number.
Reports say Apple first mentioned the feature briefly during WWDC 2026, without detailed public explanation at the time. One outlet notes a developer demonstration that outlines how the feature works and points to limitations. Another outlet describes a setup path in the iOS 27 Settings app under the Cellular menu, where users choose a main iPhone and a companion iPhone.
Across the accounts, sources agree that iPhone Handoff relies on both phones running iOS 27 and involves carrier support. They also converge on operational details: cellular settings are managed on the main iPhone, and location sharing follows whichever iPhone is currently using the phone number. Coverage differs mainly in emphasis, with some focusing on the initial WWDC mention and others on a practical walkthrough and potential early carrier availability.
