T-Mobile Is Cashing in on a Useful iOS 27 Feature: Charges $5 a Month, With No Rival for Now

Apple is bringing a useful new feature to iPhones with iOS 27 that lets users share a single phone number across two iPhones.

But while Apple is adding iPhone Handoff as an iOS 27 feature, T-Mobile is charging customers $5 a month for the carrier service required to use it.

iPhone Handoff Lets Two iPhones Share One Number

iPhone Handoff is designed for people who regularly use two iPhones but do not want to maintain two separate numbers.

With compatible devices running iOS 27, users can designate one iPhone as the main device and another as the secondary device. The same number can then be used on both iPhones, with the number becoming active on the device the user unlocks. Only one iPhone can use the number at a time.

Apple says iPhone Handoff requires carrier support and uses eSIM technology. Both iPhones need to be running iOS 27 or later and configured for the feature.

T-Mobile says calls, texts, cellular data, mobile hotspot, Scam Shield and T-Satellite can work on the secondary iPhone with an eligible plan. Apple also notes that 'Carrier fees might apply when enrolling in iPhone Handoff'.

The feature is different from Apple's existing Handoff function, which lets users continue tasks between an iPhone, iPad, Mac and Apple Watch. Apple's iPhone Handoff is specifically designed to allow the same cellular number to be used across two iPhones.

T-Mobile Is Charging $5 a Month

T-Mobile's 10 September announcement confirms the charge directly.

The company says it is introducing iPhone Handoff at '$5/month'. The feature is available on iPhones running iOS 27, although carrier support is required.

At launch, Apple lists T-Mobile in the US and Telekom in Germany as carriers supporting iPhone Handoff. For US iPhone users, T-Mobile is currently the only carrier Apple lists as supporting the feature.

That gives T-Mobile a significant advantage for now, because US customers cannot simply switch to another major carrier offering the same service.

Technically, T-Mobile is not charging for the iOS feature itself. The $5 fee is for the carrier service that enables the second iPhone to use the same number and cellular connection. Still, that distinction may do little to soften the reaction from customers who see Handoff as an iOS 27 feature.

The $5 Fee Is Already Sparking Backlash

The reaction online has been sharply critical, although Reddit comments should be viewed as examples of online reaction rather than evidence that customers generally oppose the fee.

One user in the r/Apple discussion summed up the frustration with a simple complaint: 'Lame.'

Another wrote: 'Let's charge for a feature that already comes with the iPhone this ceo is a jackass they sure know how to pick them.'

A separate commenter questioned the value of the charge, saying: 'This should be free.'

There is also criticism from T-Mobile users who can see a practical use for the feature but do not consider it worth another recurring bill.

One Reddit user explained that having a work phone and personal phone could make Handoff convenient, but added: 'Being able to just carry my work phone Mon-Fri while also getting calls and text messages from my personal number would have been convenient, but not at $5/month.'

Not every commenter viewed the fee as unreasonable. Some Reddit users pointed out that supporting the feature requires carrier-side work and provisioning for a second eSIM.

The Bigger Question Is What Happens Next

For now, T-Mobile has an unusual advantage: it supports a potentially useful iOS 27 feature while being the only US carrier Apple currently lists for iPhone Handoff.

That could change as more networks add support. Once customers have alternatives, the $5 monthly charge could become a competitive disadvantage if rivals offer Handoff for less or include it in existing plans.

For T-Mobile customers, however, the choice is currently straightforward: pay $5 a month for the convenience of switching between two iPhones with one number, or stick with traditional eSIM transfers and other workarounds.

Either way, Apple may have built the feature, but T-Mobile has found a way to put a subscription around it.