Lock the keys and touch screen
To lock the touch screen and the keys, press the lock key on the side of the device.
To unlock, press the lock key on the side of the device, and select the unlock icon on
the screen.
When the touch screen and keys are locked, the touch screen is switched off and the
keys are inactive.
The screen and keys may be locked automatically after a period of inactivity.
To change the settings for automatic screen and key locking, select
Menu
>
Settings
and
Phone
>
Phone mgmt.
>
Auto. keyguard
>
Keypad autolock period
.