Apple’s latest iOS update is bringing a feature that many iPhone users have been waiting for: the ability to use a single phone number across two different iPhones. Announced during the iPhone 18 Pro, iPhone 18 Pro Max, and iPhone Duo launch event, this new capability is called iPhone Handoff. It will be available starting Monday with the public release of iOS 27. Initially, the feature is supported by T-Mobile in the United States and Telekom in Germany. But how much will this convenience cost you? T-Mobile has now revealed the pricing details, and it’s an additional $5 per month on top of your existing plan.
What Is iPhone Handoff and How Does It Work?
iPhone Handoff is designed to let you link one phone number to two separate iPhones. This means you can have your primary number active on both devices without needing a second SIM card or a separate line. The catch is that the number can only be active on one iPhone at a time. So if you’re using your main iPhone and want to switch to your secondary device, you’ll need to hand off the number to that phone. The process is meant to be seamless, similar to how Apple’s Continuity features work across Macs, iPads, and iPhones.
When you initiate a handoff, the number transfers from one iPhone to the other. Any incoming calls, texts, and data usage will then route to the active device. The inactive iPhone will no longer receive calls or messages on that number until you switch back. This is different from simply forwarding calls, as the number is fully associated with the active device at any given time. It’s a true dual-device solution for people who carry two iPhones but want to manage a single line.
The feature is built into iOS 27, so no additional app is required. You’ll find the option in Settings under Cellular or Phone, depending on your carrier. T-Mobile and Telekom are the first to support it, but more carriers are expected to follow in the coming months. Apple has not yet announced a full list of supported providers, but given the initial rollout, it’s likely that major carriers in other regions will adopt it soon.
How the Handoff Process Works
Using iPhone Handoff is straightforward. Once you’ve set it up through your carrier, you’ll see an option to transfer your number between your two iPhones. You can trigger the handoff manually from the active device or from the inactive one, depending on your preference. The transfer takes just a few seconds, and during that time, calls may be briefly interrupted. After the switch, the new device becomes the active one, and the old device goes into a standby mode for that number.
It’s important to note that both iPhones must be signed in with the same Apple ID and be running iOS 27 or later. They also need to be connected to the same carrier account. The feature is not designed for sharing a number with someone else; it’s meant for personal use across your own devices. So if you have a work phone and a personal phone, you can now consolidate your number onto both without carrying two separate lines.
Limitations and Considerations
While the concept sounds convenient, there are some limitations. First, as mentioned, only one iPhone can be active at a time. This means you can’t receive calls on both devices simultaneously. If you’re someone who needs to be reachable on two phones at once, this feature won’t solve that problem. Second, the handoff is not automatic; you have to manually switch the number between devices. There’s no geofencing or scheduling option at launch, though future updates could add such features.
Another consideration is battery life and connectivity. The inactive iPhone will still need a data connection to stay synced with iCloud and other services, but it won’t receive cellular calls or texts on the handed-off number. You’ll need to ensure both devices are charged and connected to Wi-Fi or a cellular network for the handoff to work smoothly. Also, emergency calls may behave differently when the number is inactive, so it’s worth checking with your carrier about how 911 or emergency services are handled.
T-Mobile Pricing and Availability
T-Mobile has confirmed that iPhone Handoff will cost $5 per month. This is an add-on to your existing plan, not a standalone service. The charge applies per number, so if you have multiple lines, each one you want to use with Handoff will incur the fee. The feature is available on both postpaid and prepaid plans, though some older plans may not be compatible. T-Mobile recommends checking your account or contacting customer care to confirm eligibility.
The $5 monthly fee covers the ability to use your number on two iPhones. There are no additional activation fees or hardware requirements beyond having two compatible iPhones. The service is available starting Monday, coinciding with the release of iOS 27. T-Mobile customers can enable it through the My T-Mobile app or online account portal. Once activated, you can set up Handoff on your devices through the iOS Settings app.
For a limited time, T-Mobile is offering a free trial of iPhone Handoff for the first month. This allows users to test the feature and see if it fits their needs before committing to the monthly charge. After the trial, the $5 fee will apply automatically unless you cancel. The trial is available to new and existing customers who meet the eligibility criteria.
Telekom Germany Pricing
In Germany, Telekom has not yet announced its pricing for iPhone Handoff. However, given the similar structure of the feature, it’s expected to be a comparable monthly add-on. Telekom customers should watch for an official announcement in the coming weeks. The rollout in Germany is part of Apple’s initial launch, so availability should be simultaneous with the US, but pricing may vary based on local market conditions.
What About Other Carriers?
Apple has not disclosed which other carriers will support iPhone Handoff. The feature requires carrier-side integration, so it’s not something that can be enabled unilaterally by Apple. AT&T and Verizon, the other two major US carriers, have not commented on whether they will offer the service. It’s likely that they will eventually, but no timeline has been given. For now, T-Mobile is the exclusive US carrier for the feature.
Internationally, carriers in the UK, Canada, Australia, and other markets are expected to adopt iPhone Handoff in the future. The technology is built on standard eSIM and network protocols, so expansion should be relatively straightforward once carriers update their systems. However, each carrier will set its own pricing, which could be higher or lower than T-Mobile’s $5 per month.
Is iPhone Handoff Worth the Cost?
Whether iPhone Handoff is worth $5 per month depends on your specific needs. If you frequently carry two iPhones—perhaps one for work and one for personal use—and want to avoid carrying two separate numbers, this feature can be a game-changer. It simplifies your life by letting you use one number across both devices, and the manual handoff is quick enough for most scenarios.
On the other hand, if you rarely switch between devices or don’t mind having two numbers, the $5 fee might not be justified. The limitation of only one active device at a time means you can’t truly use both phones simultaneously for calls and texts. For some, that’s a dealbreaker. Additionally, if you already use call forwarding or a VoIP service to achieve similar results, you might not need Handoff.
Consider how often you’d actually use the handoff. If you’re someone who moves between devices multiple times a day, the convenience could be well worth the cost. But if you only switch occasionally, the fee might feel unnecessary. It’s also worth noting that the $5 charge is per line, so if you have multiple numbers you want to use with Handoff, the costs add up quickly.
Alternatives to iPhone Handoff
Before committing to the monthly fee, explore alternatives. Some carriers offer multi-SIM services that let you share a number across devices for free or at a lower cost. For example, Google Fi has a similar feature called “Data SIM” that allows you to use your number on multiple devices, though it’s primarily for data. Other options include using a VoIP app like Google Voice or Skype, which can provide a second number that rings on multiple devices. These solutions aren’t as integrated as iPhone Handoff, but they can be more cost-effective.
Another alternative is to simply forward calls from one iPhone to the other. This doesn’t require carrier support and is free, but it only works for calls, not texts. You can also use iMessage and FaceTime with your Apple ID to communicate across devices without needing the same phone number. For many users, these workarounds are sufficient and eliminate the need for a paid service.
What Apple Says About Privacy and Security
Apple emphasizes that iPhone Handoff is designed with privacy in mind. The handoff process is encrypted, and your number is not shared with Apple; it remains between you and your carrier. The feature uses the same security protocols as eSIM and iMessage, so your calls and texts are protected. When the number is inactive on one device, that device cannot access cellular data or make calls on that line, which adds a layer of security if one phone is lost or stolen.
However, if someone has access to your active iPhone, they can hand off the number to another device if they know your passcode. Apple recommends using strong passcodes and enabling Find My to protect your devices. As with any feature that links devices, it’s important to keep your Apple ID secure and enable two-factor authentication.
The Bottom Line
iPhone Handoff is a convenient new feature for iOS 27 that lets you use one phone number on two iPhones. T-Mobile will charge $5 per month for the service, with a free trial for the first month. The feature is initially available on T-Mobile in the US and Telekom in Germany, with more carriers expected to follow. While it’s a useful tool for those who juggle two iPhones, the manual handoff and single-active-device limitation may not suit everyone. If you’re a T-Mobile customer with two iPhones, it’s worth trying the free trial to see if it fits your lifestyle. For everyone else, keep an eye on your carrier for future availability and pricing.
