1. Find "Network Selection"
Press Mobile Data.
Press Network Selection.
2. Select network
To select network manually, press the indicator next to "Automatic" until the function is deactivated.
Press the required network.
To select network automatically, press the indicator next to "Automatic" until the function is activated.
3. Return to the Home screen
Press Back to save the setting.
Slide your finger upwards starting from the bottom of the display to return to the Home screen.