TCL 306
Android 12.0
1 Find "Roaming Mode"
Slide two fingers downwards starting from the top of the screen.
Press the settings icon.
Press SIM card & mobile network.
Press the name of the SIM.
Press Roaming Mode.
2 Turn data roaming on or off
Press the required setting to turn the function on or off.
3 Return to the home screen
Press the Home key to return to the home screen.