Samsung Galaxy S9
Android 8.0
Select help topic
1. Find "Settings"
Press Phone.
Press the menu icon.
Press Settings.
2. Turn Wi-Fi calling on or off
Press the indicator next to "WiFi Calling" to turn the function on or off.
When Wi-Fi calling is active, the Wi-Fi calling icon is displayed.
3. Return to the home screen
Press the Home key to return to the home screen.