1. You need a smartphone that supports Wi-Fi Calling and a wireless account that is set up for AT&T HD Voice. Most AT&T PREPAID plans include Wi-Fi Calling; pay per minute plans do not include Wi-Fi Calling.
2. You need to set up Wi-Fi Calling on your phone.
iPhone: Go to the phone settings menu on your device and turn on Wi-Fi Calling.
Android: Go to Call Settings, Quick Settings, or Connections Settings on your device and turn on Wi-Fi Calling.
3. During setup, you’ll need to provide an address for 911 emergency call routing. You don’t need any additional software or apps.
4. Once Wi-Fi Calling is enabled on your device, your phone will need to connect to an available Wi-Fi network. Remember, Wi-Fi Calling is used automatically if your cellular signal is weak or unavailable or if you are traveling outside the Domestic Coverage Area and connected to a Wi-Fi network.