iPhone Handoff is a new iOS 27 feature that allows users to share a single phone number across two iPhones, eliminating the need for separate carrier accounts, according to Apple. The capability was first mentioned briefly at WWDC and detailed during Apple’s Surprise and Shine event on September 9.
How iPhone Handoff Works
The feature lets you use the same phone number on two devices simultaneously. Once configured, users simply unlock the iPhone they want to use, according to Apple’s presentation details.
When activated, a small notification appears in the Dynamic Island just beneath the Wi-Fi indicator to show that the device is active. Apple designed the setup process to be straightforward, requiring two devices running iOS 27 or later connected to the same Wi-Fi network and signed into the same Apple Account for iCloud, FaceTime, and iMessage.
Setup Requirements and Carrier Support
Setting up the feature requires designating one device as the primary phone and the other as the secondary device, according to Apple. The primary device holds the main eSIM and manages carrier settings, while each phone can use its own eSIM provided both lines come from supporting carriers.
Carrier support is currently limited. According to Apple and early announcements, T-Mobile in the US and Telekom in Germany are the only confirmed supporters, with T-Mobile applying an additional $5 monthly fee for the service.
Step-by-Step Setup Guide
Pro Tip: Place your two iPhones next to each other before starting the configuration process to ensure a smooth setup.
- Place your two iPhones next to each other and unlock one device.
- Navigate to Settings > Cellular and tap Set Up Cellular/Add eSIM, or select iPhone Handoff if a number is already configured on the device.
- Choose Use Number on This iPhone and Another, tap Continue, and follow the on-screen prompts to assign your main iPhone.
When replacing an old iPhone with a new one, users must transfer the eSIM to the new device. Apple states that completely disabling Handoff requires contacting your carrier directly.
Practical Use Cases
While the feature remains niche, Apple highlights several practical applications. Users can utilize Handoff when migrating between an old and a new iPhone, or to carry an older, less valuable device while traveling.
The tool also appeals to people who want to pair a cheaper or more portable iPhone alongside a premium $2,000 iPhone Duo model. Additionally, professionals who manage separate devices for work and personal life may find the single-number setup useful.
Did you know? You do not need to manually toggle settings between calls or messages; unlocking the secondary phone automatically routes your active identity to that device, according to Apple.
Frequently Asked Questions
Do I need separate carrier accounts for two iPhones with iPhone Handoff?
No. iPhone Handoff lets you use a single phone number across two iPhones without running separate accounts, according to Apple.
Which carriers currently support iPhone Handoff?
As of the initial rollout, T-Mobile in the US and Telekom in Germany are the only confirmed supporting carriers, with T-Mobile charging a $5 monthly fee.
What software version is required for iPhone Handoff?
Both devices must run iOS 27 or later, be connected to the same Wi-Fi network, and be signed into the same Apple Account, according to Apple.
How do I disable iPhone Handoff?
Apple states that disabling the feature completely requires contacting your mobile carrier.
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