Lock or unlock the keyboard
Lock the keyboard

In the home screen, select Menu, and quickly press the right selection key.

Set the keyboard to lock automatically after a defined length of time

Select Menu > Ctrl. panel > Settings and General > Security > Phone and SIM card > Keypad autolock period > User defined, and select the desired length of time.

Unlock the keyboard

Select Unlock > OK.

When the device or keypad is locked, calls may be possible to the official emergency number programmed into your device.