Apple has added a new “iPhone Handoff” feature to iOS 27 that will allow you to switch between two iPhones while using the same phone number on each device. This functionality was briefly mentioned during the WWDC 2026 keynote in June, in a slide that listed hundreds of new features coming to iOS 27 and corresponding software updates, but Apple never shared more details at the time. MacRumors forum member pdfu today shared a video demonstrating how the feature will work, using two simulated iPhones running on Xcode 27’s Device Hub. “iPhone Handoff” can be configured from the Settings app, in the Cellular menu. During the setup process, you can choose which iPhone you want to be the primary device you use most frequently and which you want to be the companion device. Apple says a user’s primary eSIM will remain on the primary iPhone, while the companion iPhone will receive a companion eSIM, and this will allow them to switch between devices while using the same phone number. All cellular settings are managed on the primary iPhone and location sharing is based on which iPhone is actively using the phone number. In addition to requiring two iPhones running iOS 27, “iPhone Handoff” will apparently require carrier support. The forum post mentions that T-Mobile in the US and Deutsche Telekom in Germany could be among the first operators to offer this feature. After three months of beta testing, iOS 27 is expected to launch later this month, so we’ll likely hear more about this feature soon.
