Overview
- A leaked demo posted this week by a MacRumors forum user showed iPhone Handoff running in Xcode’s Device Hub and revealed the feature’s setup flow and behavior.
- Users set up Handoff in Settings > Cellular, designate a main iPhone and a companion iPhone, keep the primary eSIM on the main phone, and install a linked companion eSIM on the second device.
- The phone number appears to switch automatically to the unlocked, active device and shows a Dynamic Island notification when control changes.
- The feature is not purely software based and requires carrier support, with T‑Mobile in the U.S. and Deutsche Telekom in Germany reported as likely early partners but not yet confirmed.
- Public use depends on iOS 27’s release later this month and on individual carriers’ account and billing rules, so Handoff should ease multi‑phone convenience but may not change costs until operators announce policies.