1. Find "Carrier"
Press Wireless & networks.
Press Mobile network.
2. Select network
To select a network automatically, press Automatically select network to activate the function.
To select a network manually, press Automatically select network 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.