Switching Network Mode
1.Tap Home Key > > Settings > Wireless & networks > Mobile networks > Network Mode.
2.Select the network mode you prefer.
You can also tap the Use only 2G networks check box to save battery power.
Switching Network Operators
1.Tap Home Key > > Settings > Wireless & networks > Mobile networks > Network operators.
2.Tap Search networks to set the network operator manually, or tap Select automatically to set the network operator automatically.
9.2Security Settings
You can protect your phone and the SIM card from unauthorized use.
9.2.1Protecting Your Phone with a Screen Lock
Setting a Screen Unlock Pattern
You can protect your phone from unauthorized use by creating a personal screen unlock pattern.
1.Tap Home Key > > Settings > Location & security >
Set unlock pattern.
85