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, your phone automatically switches between the two network modes provided that you're within range of a 3G network.
If you select 3G, your phone can only connect to 3G networks.
If you select GSM, you can't achieve high data speeds.
If you select Dual mode, your phone automatically switches between the two network modes provided that you're within range of a 3G network.
If you select 3G, your phone can only connect to 3G networks.
If you select GSM, you can't achieve high data speeds.
Exit
Press the Menu key to return to standby mode.