How to Enable AT&T Wifi Calling

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1) Go to Settings, Phone, Wi-Fi Calling

2) Switch Wi-Fi Calling on This iPhone to ON.

3) Tap Continue on the AT&T pop-up to activate.

4) Scroll through the Terms of Service and tap Accept.

5) Enter your Emergency Contact address for 911 calls.

6) Tap OK on the next window and Wi-Fi calling should be available.