Apple Launches iPhone Handoff on Sept. 14 for 1 Number Across 2 iPhones

Q: Will Apple's seamless new iPhone Handoff feature secretly cost you a hidden monthly fee from your telecom carrier?

Yes—depending on your carrier, iPhone Handoff may come with an extra monthly charge. Apple itself warns in its support documentation that “carrier fees might apply when enrolling in iPhone Handoff.” That means the feature is not universally free, even though it is built into iOS 27. At launch, the clearest example is T-Mobile in the United States, which has said it will charge $5 per month to use iPhone Handoff. Reports indicate the fee is tied to T-Mobile’s MultiSIM-style support that lets one number work across two iPhones. Apple also notes that turning off the feature may require contacting your carrier, so simply deleting the secondary eSIM may not automatically stop billing. In Germany, Deutsche Telekom supports iPhone Handoff at launch, but the available information does not show a separate dedicated iPhone Handoff fee there. That could still vary by plan or account type, so customers would need to confirm with the carrier directly. So the key point is that the cost is carrier-controlled, not set by Apple. If your carrier treats the companion eSIM as a paid add-on, you could face a recurring charge. Before enabling iPhone Handoff, users should check whether their plan includes it, whether a companion eSIM costs extra, and how to cancel the service if they stop using it.

Q: Is the revolutionary iPhone Handoff just a clever ecosystem trap to make you buy Apple's expensive new foldable phone?

Not necessarily. iPhone Handoff clearly strengthens Apple’s ecosystem, and it will make the new $1,999 foldable iPhone Duo more appealing, but the feature is broader than a foldable-phone sales tactic. The main evidence is compatibility. Apple says iPhone Handoff works on any two iPhones running iOS 27, not just the iPhone Duo. That means an iPhone 11 or later, including newer SE models, can use it if the carrier supports it. Users do not need to buy Apple’s latest hardware to benefit. What Apple is doing is solving a real problem for a niche but meaningful group of customers: people who carry two iPhones, such as a work and personal phone, a compact phone and a larger device, or a standard iPhone plus a foldable. Calls, voicemail, iMessage, RCS, SMS, Find My location and iCloud-synced data follow whichever iPhone is active, which is more seamless than call forwarding or manually moving an eSIM. But there are limits that weaken the idea that this is a pure “revolution.” Only one phone is active at a time, the main iPhone keeps control of cellular settings, Apple Watch does not switch with it, some Wallet items may work on only one device, and launch support is restricted to T-Mobile and Telekom Germany. T-Mobile is also expected to charge about $5 a month. So the smarter reading is that iPhone Handoff is both useful feature and ecosystem lock-in: practical for dual-iPhone users, commercially helpful to Apple, and especially attractive if you are tempted by the Duo.

3 articles · Updated · CNET · Sep 9

iOS 27, due Sept. 14, will let users keep one phone number active across two iPhones through a new iPhone Handoff feature Apple detailed at its Surprise and Shine event.
Apple said the number becomes active on whichever iPhone the user picks up, with setup done in Cellular settings by placing the phones close together and assigning a main eSIM and a companion eSIM.
T-Mobile and Telecom Germany will support the feature at launch, while Verizon and EE are slated to add support by year-end and more carriers are expected later.
The feature surfaced only briefly at Apple’s June developers conference and then appeared in user reports and a MacRumors video before Wednesday’s fuller announcement alongside the iPhone 18 Pro, Pro Max and foldable iPhone Duo.