Apple officially announced the cellular number-sharing feature for iOS 27 at its launch event.
Apple ties two phones to one number
Carrier monthly fees and limited network support narrow access to iOS 27 cellular handover.
In a nutshell
Apple has updated its iOS 27 mobile software to let two iPhones share a single phone number by shifting cellular calls, text messages, and location tracking to whichever device the owner unlocks. The feature solves a persistent headache for multi-device owners, but its immediate utility is narrowed by telecom carriers who control network access and are attaching monthly recurring fees to the service.
Highlights
- Apple launched iPhone Handoff on September 14 alongside the public rollout of iOS 27.
- Launch availability is limited to T-Mobile in the United States and Deutsche Telekom in Germany.
- T-Mobile US set pricing for the feature at $5 per month.
- Deutsche Telekom integrated the capability into its existing €6.95 monthly MultiSIM plan.
- Verizon and EE committed to introducing network compatibility before the end of the year.
From the Editor’s Diary
Hardware convenience remains chained to carrier control whenever a device feature depends on network infrastructure rather than proprietary cloud software.
Who's involved
Apple Inc.
US technology corporation designing mobile hardware and software
goal → Strengthen consumer retention by enabling shared cellular access across multiple proprietary handsets
Kaiann Drance
Apple Vice President of Worldwide iPhone Product Marketing
goal → Present dual-device cellular capabilities and hardware compatibility during product launch
T-Mobile US
Major US wireless network operator
goal → Generate new service revenue by charging a recurring add-on fee for secondary phone access
Deutsche Telekom
German telecommunications carrier
goal → Retain higher-tier subscribers by bundling multi-device capability into existing service tiers
iPhone Dual-Device Users
Consumers operating two separate Apple smartphones
goal → Run one phone line across secondary hardware without maintaining two cellular plans
In short
Apple has eliminated the need to juggle separate mobile accounts on dual handsets, letting users link a single phone number across two active iPhones running its iOS 27 software. The feature shifts active calls, text messages, and location tracking dynamically to whichever handset a user unlocks, removing a persistent friction point for professionals carrying separate personal and work hardware.
Global network adoption will decide whether the system becomes standard or remains a niche add-on. Because the tool relies on carrier-managed eSIM software rather than a physical SIM card, mobile operators control where and how it functions.
Widespread availability remains uncertain because only two carriers support the launch. Rollouts across additional providers will determine whether other telecom operators back the standard or hold it behind add-on fees.
How it unfolded
Apple tests dual-phone cellular link
Apple first disclosed work on multi-device cellular links at its Worldwide Developers Conference in June 2026, presenting it as an iOS 27 system feature while withholding network partner requirements. The announcement signaled an expansion of Apple Handoff, which historically synced open apps, browser pages, and clipboard data across Mac, iPad, and iPhone hardware rather than live cellular lines. Public curiosity increased over the summer after online forum testers circulated videos showing internal menu toggles for switching electronic SIM profiles between paired handsets.
Apple details rollout alongside carrier charges
Apple formally unveiled iPhone Handoff on September 9 during its product keynote alongside the iPhone 18 Pro and iPhone Duo, setting the consumer rollout for the September 14 release of iOS 27. The reveal exposed immediate carrier friction: access required network-level integration and new customer fees. T-Mobile US introduced a $5 monthly fee for the capability, while Germany's Deutsche Telekom folded access into an existing €6.95 monthly multi-device plan. While iCloud synchronizes files and data between paired devices, only one handset operates the active cellular connection at any moment.
Where things stand
The iOS 27 operating system update is now live and enables iPhone Handoff on all compatible devices, provided both handsets share an identical Apple Account and use supported mobile carriers. At launch, active use remains restricted to customers on T-Mobile in the United States and Deutsche Telekom in Germany.
Global reach depends on carrier participation and pricing. US carrier Verizon and British operator EE have pledged to activate support before the end of the year, while mobile providers across Asia and continental Europe have not announced launch schedules.