1. Find "Preferred network type"
Press Wireless & networks.
Press Mobile network.
Press Preferred network type.
2. Select network mode
Press the required network mode.
There may be different network modes available depending on where you are. If you set your mobile phone to the fastest network mode, it will always find the network with the highest data speed and best signal.
3. Return to the Home screen
Press the home icon to end the session and return to the Home screen.