WiFi calling lets your iPhone make and receive calls over a wireless network instead of your cellular signal
When WiFi calling is on, your phone routes calls through your home or office WiFi rather than through your carrier's cell towers. This is useful in places where cell signal is weak — a basement, a rural area, or inside a building with thick walls. It also works when you're traveling internationally and connected to WiFi; many carriers charge less for WiFi calls than for roaming calls, or let you call home for free.
The feature works on most iPhones running iOS 10 or newer. Your carrier must support it — AT&T, Verizon, T-Mobile, and most regional carriers do, but you should check with your own provider first. Once it's on, your phone switches between WiFi and cellular automatically depending on which signal is stronger.
Key Takeaways
- WiFi calling works on iPhones running iOS 10 or later, but your carrier must support it — check your carrier's website to confirm.
- You turn on WiFi calling in Settings > Phone > WiFi Calling and toggle the switch to on.
- Your phone will ask for your address the first time you enable it; this is required by law for emergency services to locate you.
- Once enabled, your phone automatically switches between WiFi and cellular calls depending on which signal is stronger.
- WiFi calling uses your data plan's internet connection, not your minutes, so it does not count against call limits.
The step-by-step process to enable WiFi calling
Open the Settings app on your iPhone. Tap Phone near the top of the menu — it's the green icon with a phone receiver. You'll see a list of phone-related options.
Look for WiFi Calling in that list and tap it. A toggle switch will appear. Tap the toggle to turn it on; it will turn green when active. Your phone may ask you to confirm your emergency address — this is a legal requirement so emergency services can locate you if you call 911 over WiFi. Enter your address and tap Save.
That's the entire process. Your phone will now show a WiFi symbol next to the signal bars when you're connected to a WiFi network that supports calling. You don't need to do anything else; calls will route through WiFi automatically when the signal is strong enough.
Why your carrier needs your address for WiFi calling
When you make a 911 call over WiFi, the emergency dispatcher needs to know where you are. Unlike a cell tower, which has a physical location, WiFi doesn't automatically tell the system your address. The law (the ENHANCE 911 Act) requires carriers to collect your address so dispatchers can send help to the right place.
You can update your emergency address anytime by going back to Settings > Phone > WiFi Calling and tapping Update Emergency Address. If you move, update it — this is important if you ever need to call 911 over WiFi.
What happens when WiFi calling is on
Your iPhone will prioritize whichever signal is strongest — WiFi or cellular. If you're on a strong WiFi network, calls go through WiFi. If you step outside or move to an area with weak WiFi but strong cell signal, your phone switches to cellular without dropping the call. This handoff usually happens so smoothly you won't notice it.
Calls made over WiFi use your internet connection, not your cellular minutes. If you have an unlimited calling plan, this doesn't change anything. If you have a limited plan, WiFi calls still count against your minutes with most carriers — the difference is that they don't use cellular data.
When WiFi calling might not work
Some WiFi networks block calling — hotels, airports, and public WiFi hotspots often disable it for technical reasons. If your phone shows the WiFi calling symbol but calls won't go through, try switching to a different network or turning WiFi calling off temporarily.
If you're traveling outside your home country, check with your carrier before relying on WiFi calling. Some carriers restrict it in certain regions, or charge international rates even for WiFi calls. A quick call to your carrier's support line before you travel can save you from surprise charges.
Turning WiFi calling off if you don't want it
Go back to Settings > Phone > WiFi Calling and toggle the switch to off. Your phone will use only cellular signal for calls. You can turn it back on anytime using the same steps.
Some people turn it off because they prefer to use cellular only, or because they're on a limited data plan and want to avoid any chance of unexpected usage. There's no penalty for turning it off — it's entirely your choice.
Frequently Asked Questions
Does WiFi calling cost extra?
No. WiFi calling is included with your phone plan at no additional charge. Calls count the same way they do on cellular — against your minutes if you have a limited plan, or unlimited if you have unlimited calling. The only difference is the connection method.
Will WiFi calling work if my internet is slow?
WiFi calling needs a reasonably stable connection, but not a fast one. A typical home WiFi network works fine. If your connection is very slow or keeps dropping, calls may be choppy or disconnect. Try moving closer to your router or restarting it.
Can I use WiFi calling on a guest network?
Usually yes, as long as the network is stable and doesn't block calling. Some guest networks are configured to block VoIP and calling services. If calls won't go through on a guest network, ask the network owner or try a different network.
What if I don't update my emergency address?
Your phone will remind you, but it won't prevent you from using WiFi calling. However, if you call 911 over WiFi without an address on file, the dispatcher may have trouble locating you. It's worth the two minutes to enter it correctly.
Does WiFi calling work internationally?
Yes, if you're connected to WiFi abroad, you can make and receive calls. Check with your carrier first — some charge international rates for WiFi calls, while others offer them free or at a reduced rate. This varies by carrier and destination.