|Lock the keypad|
Select Menu, and press the function key within 3.5 seconds.
|Unlock the keypad|
Select Unlock, and press the function key within 3 seconds. If requested, enter the lock code.
|Answer a call when the keypad is locked|
Press the call key. When you end or reject a call, the keypad locks automatically.
|Set automatic keypad lock|
Select Menu > Settings > Phone > Automatic keyguard > On, and set the length of time, after which the keypad locks.
When the device or keypad is locked, calls may be possible to the official emergency number programmed into your device.