Wi-Fi Calling on iPhone: Turn It On or Off

Wi-Fi Calling lets your iPhone make and receive calls over a Wi-Fi network when cellular service is weak or unavailable. This guide shows you how to enable or disable the feature, what you need before you start, and how to fix common problems.

What You’ll Need

An iPhone 5c or later (any model that supports iOS 11 or newer).
A carrier that supports Wi-Fi Calling. Most major US carriers (AT&T, T-Mobile, Verizon) and many international ones offer it, but check your carrier’s website or contact support if you’re unsure.
An active SIM card or eSIM from that carrier.
A stable Wi-Fi network with internet access.
iOS updated to a recent version (Settings > General > Software Update).

Step-by-Step

Open the Settings app on your iPhone. It’s the gray gear icon on your home screen.
Tap “Phone” in the settings list. It’s usually near the top, under your Apple ID banner.
Tap “Wi-Fi Calling”. This option is near the middle of the Phone settings page.
Toggle “Wi-Fi Calling on This iPhone” to the green ON position. If it’s already green, Wi-Fi Calling is enabled.
Confirm the pop-up. The first time you turn it on, a dialog may appear explaining that emergency calls may route differently. Tap “Enable” or “Turn On” to confirm.
Enter or confirm your emergency address (if prompted). Some carriers ask for a physical address so emergency services can locate you. Enter your home address and tap “Save” or “Done”.
To disable Wi-Fi Calling, repeat steps 1-3 and toggle the switch to the OFF (gray) position. No confirmation is needed to turn it off.

Common Mistakes

Looking in the wrong place: Wi-Fi Calling is under Settings > Phone, not under Settings > Wi-Fi. Many people search the Wi-Fi settings first and get confused.
Not updating iOS: If you don’t see the Wi-Fi Calling option at all, your iOS version may be too old. Update your iPhone first, then check again.
Forgetting to set an emergency address: Some carriers won’t activate Wi-Fi Calling until you provide a valid address for 911 calls. If the toggle won’t stay on, this is often the reason.
Turning it off on the lock screen: The Control Center has a Wi-Fi toggle, but that only disconnects from the current network—it does not disable Wi-Fi Calling. Use the Phone settings as described above.
Assuming it works on all Wi-Fi networks: Some public or enterprise Wi-Fi networks block the ports used by Wi-Fi Calling. If it doesn’t work at a coffee shop, it’s likely the network, not your phone.

Tips

Keep it on for better coverage: Even if you have good cellular signal at home, Wi-Fi Calling can improve call quality in basements, elevators, or rural areas where signal drops.
Use “Prefer Wi-Fi on This iPhone”: If your carrier supports it, you’ll see a second toggle below the main one. Turning this on makes your iPhone use Wi-Fi for calls whenever you’re connected to a Wi-Fi network, even if cellular signal is strong. This can save battery and improve call quality.
Check your carrier’s settings: Some carriers require you to also enable Wi-Fi Calling on their website or app before it works on your phone. If the toggle is grayed out, log into your carrier account and look for a Wi-Fi Calling setting.
Test before you rely on it: After enabling, make a test call while your phone is in Airplane Mode with Wi-Fi turned back on. If the call connects, Wi-Fi Calling is working.
Remember it works for SMS/MMS too: On most carriers, Wi-Fi Calling also handles text messages when cellular is unavailable.

Troubleshooting

Wi-Fi Calling option is missing entirely
Update iOS to the latest version. Then restart your iPhone (press and hold the side button and either volume button, slide to power off, then turn it back on). If it still doesn’t appear, contact your carrier to confirm your plan supports Wi-Fi Calling.

The toggle is grayed out or won’t stay on
This usually means your carrier hasn’t activated the feature for your line, or your emergency address is missing. Call your carrier’s customer service and ask them to enable Wi-Fi Calling on your account. Then go back to Settings > Phone > Wi-Fi Calling and try again.

Calls still drop or sound bad
Your Wi-Fi network may be too slow or congested. Move closer to your router, or restart your router. Also check that your internet connection has enough upload speed (at least 1 Mbps) for voice calls. If the problem persists, try forgetting the Wi-Fi network and reconnecting.

Wi-Fi Calling works at home but not at work
The office network likely blocks the necessary ports. This is common on corporate networks. You can’t fix it from your phone—ask your IT department if they can allow Wi-Fi Calling traffic, or just rely on cellular while at work.

Emergency address error
If you get an error when entering your address, make sure you’re using the exact format your carrier expects (e.g., include apartment numbers). Try a different address format, or call your carrier to set it up on their end.

After disabling, calls still route over Wi-Fi
Wait a few minutes—the change can take a moment to propagate. If it persists, restart your iPhone. Also check that you haven’t enabled “Wi-Fi Calling for Other Devices” (Settings > Phone > Wi-Fi Calling), which allows calls on your iPad or Mac and may still use Wi-Fi.

Frequently Asked Questions

Does Wi-Fi Calling use my cellular minutes?
No. Wi-Fi Calling uses your internet connection, not your cellular plan’s minutes. However, calls to international numbers may still incur long-distance charges depending on your plan.

Will Wi-Fi Calling work when I’m traveling abroad?
Yes, in most cases. When you’re outside your home country, Wi-Fi Calling can let you call back home without international roaming charges, as long as you’re connected to Wi-Fi. Check with your carrier, as some restrict this feature while roaming.

Can I use Wi-Fi Calling on my iPad or Mac?
Yes, if you have an iPad (with cellular) or a Mac, you can enable “Add Wi-Fi Calling for Other Devices” in the same Wi-Fi Calling settings menu. Your iPhone must be on the same Apple ID and connected to Wi-Fi for this to work.

What happens to 911 calls when Wi-Fi Calling is on?
Emergency calls will be routed through Wi-Fi if cellular is unavailable. The dispatcher may receive your emergency address (the one you registered) instead of your exact GPS location. This is why setting a correct address is important.

Does Wi-Fi Calling drain my battery faster?
Generally, no. In fact, it can save battery because your phone doesn’t have to constantly boost its cellular radio to maintain a weak signal. However, if your Wi-Fi connection is unstable, the phone may switch back and forth, which can drain battery faster.

Is Wi-Fi Calling the same as using WhatsApp or FaceTime?
No. Wi-Fi Calling uses your regular phone number and the built-in Phone app. The person you call sees your normal number, and you don’t need the other person to have any special app. WhatsApp and FaceTime require both parties to have the same app installed.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

More in this bed

The whole Tech How-To bed →