1. Find "Carrier"
Press Wireless & networks.
Press Mobile network.
2. Select network
To select network automatically, press Choose automatically to activate the function.
To select network manually, press Choose automatically to deactivate the function.
Press OK and wait while your mobile phone searches for networks within range.
Press the required network.
3. Return to the Home screen
Press the home icon to end the session and return to the Home screen.