Lock the keys and touch screen
When the device or keypad is locked, calls may be possible to
the official emergency number programmed into your
device.
To lock or unlock the touch screen and the keys, slide the lock
switch on the side of the device.
When the touch screen and keys are locked, the touch screen
is turned off and the keys are inactive.
When you push the touch screen up, the keyboard unlocks.
The screen and keys may be locked automatically after a
period of inactivity.
To modify settings for automatic screen and key locking,
select
Menu
>
Settings
and
Phone
>
Phone mgmt.
>
Auto. keyguard
.