1. Find "Network Type"
Press the Navigation key.
Select the settings icon.
Select Network & Connectivity.
Select Mobile network & Data.
Select Carrier.
Select Network Type.
2. Choose network mode
Select the required network mode.
There may be different network modes available depending on where you are. If you set your 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 Disconnect several times to return to the home screen.