Apple in iOS 27 introduced iPhone Handoff, a new eSIM feature that allows you to use the same number on two iPhones and seamlessly swap between them. The number is only active on one iPhone at a time, so it's not like having two independently active lines. It's also different from Apple's existing Handoff feature for continuing an app task on another Apple device. Here's what you need to know about the new iPhone Handoff feature. What Moves Between the Two iPhones?
When you switch phones with iPhone Handoff, your calls, voicemail, messages (including iMessage, RCS, SMS, and MMS) and Find My location move to the active iPhone. You'll see a "Switched to this iPhone" message on the screen to confirm the change. Other data synced with iCloud will automatically update across your devices, and third-party apps work across both devices, though some third-party apps may require a separate sign-in or take time to sync. Any banking apps you use may also ask you to approve access on the other device. What Do You Need for iPhone Handoff?
Both iPhones must be running iOS 27 or later. They'll also need to be: Connected to Wi-Fi
iPhone Handoff works with Dual SIM as long as both eSIMs are from carriers that support iPhone Handoff. Both eSIMs must be set up for iPhone Handoff separately, one at a time. Once set up, both eSIMs switch together simultaneously when you unlock your iPhone. Which Carriers Support iPhone Handoff?
iPhone Handoff is available through T-Mobile in the United States and Telekom in Germany.
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