With the upcoming release of iOS 27, Apple is introducing a new capability known as iPhone Handoff. This feature allows users to utilize a single phone number across two separate iPhone devices simultaneously. According to a demonstration found within the Xcode 27 Device Hub, users will be able to designate one phone as the primary device and the other as a companion, enabling a seamless transition between the two.

While the feature was briefly mentioned during Apple's WWDC keynote in June, specific operational details were not provided at that time. The recent discovery of the setup process in the developer software provides the first concrete look at how the pairing will function. Industry analysts suggest that this development is strategically timed to coincide with the anticipated launch of the foldable iPhone Ultra. The ability to switch between devices may address user concerns regarding the portability and size of foldable hardware, allowing users to alternate between a larger, foldable device and a more compact handset without losing connectivity or changing SIM cards.