Turn on Wi-Fi Calling

No mobile coverage? No problem! You can make and receive calls, and send and receive text messages over a Wi-Fi network with Wi-Fi Calling. Depending on your wireless service plan, this feature might not be supported.

In the Wi-Fi Calling app, set the Wi-Fi Calling switch to On.
Note: If you move out of range of a Wi-Fi network while you're on a call, your call might be dropped.