Sony Xperia Z2 Tablet
Find "Network Mode"
Slide your finger down the display starting from the top right edge of your tablet.
Press Settings.
Press Settings.
Press More....
Press Mobile networks.
Press Network Mode.
Select network mode
Press WCDMA only, GSM only, WCDMA (preferred)/GSM or LTE (preferred)/WCDMA/GSM.
3G (UMTS) or 4G (LTE) enables you to achieve higher data speeds than when using 2G (GSM).
If you select WCDMA only, your tablet can only connect to 3G networks.
If you select GSM only, you can't achieve high data speeds.
If you select WCDMA (preferred)/GSM, your tablet automatically switches between 3G and 2G provided that you're within range of a 3G network.
If you select LTE (preferred)/WCDMA/GSM, your tablet automatically switches between the three network modes provided that you're within range of a 3G or a 4G network.
If you select WCDMA only, your tablet can only connect to 3G networks.
If you select GSM only, you can't achieve high data speeds.
If you select WCDMA (preferred)/GSM, your tablet automatically switches between 3G and 2G provided that you're within range of a 3G network.
If you select LTE (preferred)/WCDMA/GSM, your tablet automatically switches between the three network modes provided that you're within range of a 3G or a 4G network.
Return to the home screen
Press the home icon to return to the home screen.