The phone automatically locks the keypad in one minute. To change the time after which the phone automatically locks the keypad, select Menu > Settings > Config. > General > Security > Phone and SIM card > Keypad autolock period > User defined and the desired time. To manually lock the keypad in phone mode, press the left selection key and the function key within 1.5 seconds.
To prevent access to the contents of your phone, you can set a lock code. The default lock code is 12345. To unlock, press the left selection key, enter your lock code, and press the scroll key.
To change the lock code, select Menu > Settings > Config. > General > Security > Phone and SIM card > Lock code. Enter the old code and then the new code twice. The new code can be 4-255 characters long.
To set a time-out after which the device is automatically locked and can be used only if the correct lock code is entered, select Menu > Settings > Config. > General > Security > Phone and SIM card > Phone autolock period. Enter a number for the timeout in minutes, or select None to deactivate the autolock period.
When the device or keypad is locked, calls may be possible to the official emergency number programmed into your device.