Find "Network mode"
Press the Menu key.
Press Settings.
Press Connectivity.
Press Network.
Press Network mode.
Select network mode
Press Dual mode, 3G or GSM.
3G enables you to achieve higher data speeds than when using GSM.
If you select Dual mode, the phone automatically switches between the two network modes provided that you are within range of a 3G network.
If you select 3G, the phone can only connect to 3G networks.
If you select GSM, you cannot achieve high data speeds.
If you select Dual mode, the phone automatically switches between the two network modes provided that you are within range of a 3G network.
If you select 3G, the phone can only connect to 3G networks.
If you select GSM, you cannot achieve high data speeds.
Exit
Press the Menu key to return to standby mode.