Check that your phone and carrier support Wi-Fi Calling
Connect your phone to a Wi-Fi network
Open your phone’s Settings
Find the Phone, Cellular, or Network settings
Turn on Wi-Fi Calling
Follow any prompts to confirm or enter an emergency address
Make a call as usual
Use the Wi-Fi Calling indicator if shown on your screen
Keep Wi-Fi enabled while you are on the call
Switch to a stronger Wi-Fi network if call quality is poor