Apple is bringing a feature to iOS 27 that lets two iPhones share a single phone number, removing one of the most persistent frustrations for people who regularly carry multiple devices.
The feature, called iPhone Handoff, was briefly shown during WWDC 2026 in June but attracted little attention amid the broader iOS 27 announcement.
It resurfaced this week in a video posted by a MacRumors forum member, showing how the feature works with two simulated iPhones running in Xcode 27’s Device Hub.
How the setup works
The process lives inside the Cellular section of the Settings app. One iPhone is designated as the main device, the other as a companion.
The primary eSIM stays on the main phone, while the companion receives what Apple is calling a companion eSIM tied to the same number. From there, both phones can use that number as you move between them.
Apple has also addressed location sharing in a way that makes the switching feel less disjointed. Instead of permanently anchoring your location to the main device, your shared location will come from whichever iPhone is actively using the number.
For someone bouncing between a personal phone and a work phone, that distinction matters: the phone in your hand is the one that reflects where you actually are.
This is not the same as cloning a cellular plan across two phones. The main iPhone retains control of cellular settings, with the companion effectively dependent on it.
Whether that creates any practical friction in daily use remains to be seen until the feature is available on real hardware.
Carrier support is the variable
Apple can’t roll out the feature on its own. iPhone Handoff requires carrier support, with T-Mobile in the US and Deutsche Telekom in Germany reportedly among the first networks preparing to support it.
Apple has not published an official list, so availability at launch could be uneven depending on region and carrier.
Both iPhones will also need to run iOS 27, which Apple is expected to release later this month after roughly three months of beta testing.
That release should clarify which carriers are on board from day one and whether older iPhone models qualify.
For users who keep a second iPhone for travel, work, or as a backup, iPhone Handoff could eliminate the low-level inconvenience of deciding which device owns your number on any given day.
The practical scope of that benefit depends almost entirely on how quickly carriers get behind it.
