1 Find "Network operators"
Slide two fingers downwards starting from the top of the screen.
Press the settings icon.
Press Network & Internet.
Press Mobile network.
Press Network operators and your phone will search for networks.
2 Select network manually
If you want to select a network manually, press the required network.
3 Select network automatically
If you want to select a network automatically, press Automatically select network.
4 Return to the home screen
Press the Home key to return to the home screen.