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You can set your phone to select a network automatically or you can select a network manually. If you select a network manually, your phone will lose network connection when the selected network is out of reach.
1. Find "Network selection"
Press the Left selection key.
Select Network selection.
2. Select network
If you want to select a network automatically, select Auto.
If you want to select a network manually, select Manual. Your phone searches for networks within range.
Select the required network.
3. Return to the home screen
Press the Home key to return to the home screen.