Keypad lock
To prevent accidental keypresses, close the phone, and select Lock within 5 seconds to
lock the keypad.
To unlock the keypad, select Unlock > OK, or open the phone. If the security keyguard
is on, enter the security code when requested.
To set the keypad to lock automatically after a preset time when the phone is in the
standby mode, select Menu > Settings > Phone > Automatic keyguard > On.
To answer a call when the keypad is locked, press the call key. When you end or reject
the call, the keypad locks automatically.
When the device or keypad is locked, calls may be possible to the official emergency
number programmed into your device.