Apple introduced the iPhone Handoff feature with iOS 27, allowing users to share a single phone number across two separate iPhones. Initially supported by T-Mobile in the US and Deutsche Telekom in Germany, the setup requires both devices to run iOS 27 or later, share an Apple Account, and utilize companion eSIMs.
How iPhone Handoff Works Across Devices
Apple’s new iPhone Handoff feature lets users share a single phone number across two separate iPhones running iOS 27 or later. Once enabled, calls, voicemails, messages, and Find My locations automatically route to whichever iPhone is currently in use.
The setup process requires users to enable the feature in the Settings app under the Cellular section. During configuration, one device is designated as the main phone and uses the primary eSIM, while the secondary device receives a companion eSIM. Prerequisites include connecting both devices to Wi-Fi, sharing the same Apple Account, and signing into FaceTime, iMessage, and Messages in iCloud with that account.
When switching between devices, unlocking the target iPhone activates the user’s number and displays a confirmation message at the top of the screen. Primary devices handle carrier-specific services like Caller ID and Call Forwarding, while dual SIM configurations are supported provided both lines use compatible carriers and are configured individually.
Carrier Support, Pricing, and the AT&T Holdout
At launch, T-Mobile in the USA and Telekom in Germany are the only carriers supporting the feature. T-Mobile has priced the service at $5 per month. Meanwhile, Verizon has confirmed it will bring the feature to its customers by the end of the year.
AT&T remains a notable holdout, showing no interest in providing the capability to its customers.
While we see that there could be potential in capabilities like iPhone Handoff, our focus remains on delivering innovations that make life simpler and keep customers connected with confidence.
AT&T spokesperson, via CNET
The carrier also noted that existing eSIM activation and transfer options across compatible devices already exist.
Practical Use Cases for Dual-iPhone Setups
The capability introduces several potential scenarios for users who manage multiple devices. Individuals can keep one iPhone for work, loaded with professional email and productivity apps, and another for personal use with social media, without needing to maintain two different phone numbers.
Travelers may also find utility in the feature by using an older, less expensive iPhone abroad rather than carrying a newer, more costly device. The setup also helps minimize distractions by allowing users to designate one device as a stripped-down communication tool without social media apps.
Hardware Restrictions and Management Limitations
While Wallet payment cards and car keys sync smoothly across both devices, certain transit passes and IDs remain restricted to a single phone. Apple Watches must also remain paired to the most frequently used iPhone, because Handoff does not automatically migrate watch connections.
Replacing a device requires transferring the eSIM to the new iPhone, though users may need to re-enroll if direct carrier transfers are unsupported. Disabling the feature requires contacting the carrier directly, as deleting an eSIM does not cancel the underlying service agreement.