You can set the keypad of your device to lock automatically after a preset time delay.

  1. Select Menu > Settings > Phone (or Phone settings or Device) > Automatic keyguard > On or Off.
  2. If you select On, Set delay: is displayed.
  3. Enter the delay time (in mm:ss format), and select OK.

To lock the keys manually in the home screen, press the left selection key and *.

To unlock the keys, press the left selection key and *.

When keyguard is on, it may be possible to dial the emergency number programmed into your device.