WiFi calling lets you make and receive calls over internet instead of cellular signal

WiFi calling is a feature that routes your phone calls and text messages through an internet connection rather than your carrier's cellular network. This is useful when you're in a location with weak or no cell signal but have access to WiFi — like in a basement, rural area, or building with thick walls. On iPhone, the feature is built in, but it needs to be turned on in your settings and your carrier must support it.

The process takes about two minutes and works on iPhone 6s and newer models running iOS 10 or later. Once enabled, your phone automatically switches between WiFi and cellular for calls depending on which connection is stronger.

Key Takeaways

  • WiFi calling is available on iPhone 6s and newer, but your carrier must support it — check your carrier's website if you're unsure.
  • You turn on WiFi calling in Settings > Phone > WiFi Calling, then toggle the switch to on.
  • Your phone number and location information are still used for emergency calls, even over WiFi.
  • WiFi calling uses your data plan's internet connection, not a separate service, so there's no extra cost.

Check if your carrier supports WiFi calling

Not all carriers offer WiFi calling, though most major ones do. Verizon, AT&T, T-Mobile, and most regional carriers in the United States support it. If you use a smaller carrier or a prepaid plan, visit your carrier's website and search for "WiFi calling" to confirm it's available on your account.

Some carriers require you to have a certain plan or account type to use WiFi calling. A few carriers also require you to register a home address before the feature works. Your carrier's support page will tell you if any of these apply to you.

Turn on WiFi calling in iPhone settings

Open the Settings app on your iPhone and tap Phone. Scroll down and tap WiFi Calling. Toggle the switch next to "WiFi Calling on This iPhone" to the on position (it will turn green). That's all you need to do — the feature is now active.

If you don't see the WiFi Calling option in the Phone settings, your carrier may not support it, or your iPhone model may be too old. iPhone 6s and newer support WiFi calling; if you have an older model, this feature won't be available.

Update your address for emergency calls

When you enable WiFi calling, your iPhone may ask you to confirm or enter your home address. This address is used to route emergency calls to the correct local emergency services, even though you're calling over the internet. If you move, you should update this address in Settings > Phone > WiFi Calling > Update Emergency Address.

Without a registered address, emergency services may not be able to locate you if you call 911 over WiFi. This is why the address step matters — it's a safety feature, not a tracking tool.

How WiFi calling works when you're away from home

Once WiFi calling is on, your iPhone automatically uses it whenever you connect to any WiFi network — not just your home network. You'll see a small "WiFi" icon next to the signal bars at the top of your screen when a call is being made or received over WiFi instead of cellular.

Your phone switches between WiFi and cellular seamlessly. If you're on a WiFi call and walk out of range, the call may drop or switch to cellular depending on your signal strength and carrier. If you're on a cellular call and move into WiFi range, the call stays on cellular — it doesn't switch mid-call.

Troubleshooting if WiFi calling won't turn on

If the WiFi Calling toggle is grayed out or won't stay on, restart your iPhone first. Power it off completely, wait 10 seconds, then power it back on. This fixes most temporary glitches.

If it's still not working, check that you're connected to WiFi and that your carrier's network is reachable. Some carriers require you to complete a one-time setup through their website or app before WiFi calling will work. Contact your carrier's support line if the toggle remains unavailable after a restart — they can check whether WiFi calling is active on your account.

What happens to your data and costs

WiFi calling uses your internet connection, not your cellular minutes or data plan. Calls made over WiFi don't count against your monthly call limit or data allowance. Text messages sent over WiFi do use a small amount of data, but the amount is negligible.

There is no extra charge for using WiFi calling. It's included with your phone plan at no additional cost. If you're traveling internationally, WiFi calling can be a way to reach people at your regular phone number without paying international roaming rates, though you still need an active internet connection.

Frequently Asked Questions

Will WiFi calling work if I don't have cellular service at all?

Yes. As long as you have WiFi and your carrier supports it, you can make and receive calls without any cellular signal. Your phone number still works the same way.

Can I turn off WiFi calling for specific networks?

No. Once WiFi calling is on, it's on for all WiFi networks. You can only turn it completely off or on in Settings. If you want to avoid using WiFi calling on a particular network, you'd need to disconnect from that WiFi.

Does WiFi calling work internationally?

Yes, if your carrier supports it. You can call and text using your regular phone number over any WiFi network, anywhere in the world. Check with your carrier about whether international WiFi calling is included in your plan.

What if I'm on a WiFi call and lose internet connection?

The call will drop. Your phone can't automatically switch a call in progress from WiFi to cellular. You'd need to hang up and call again, at which point your phone would use cellular if it's available.

Is WiFi calling secure?

WiFi calling is encrypted by your carrier, so it's as secure as a regular cellular call. However, the WiFi network itself may not be secure — using WiFi calling on an open public network carries the same risks as any internet activity on that network.