Choose a network
You can set your mobile phone to find a network automatically or you can choose a network manually. If you select a network manually, the network connection will be lost if you're out of range of the selected network.
Find "Network operators"
Slide your finger downwards starting from the top of the screen.
Tap the settings icon.
Tap Mobile networks.
Tap Network operators.
Select network manually
If you want to select a network manually, tap Select manually and wait while your mobile phone searches for networks.
Tap the required network.
Select network automatically
If you want to select a network automatically, tap Select automatically.
Return to the home screen
Tap the Home key to return to the home screen.