User Guide
Page 8
... lock the keypad. Set automatic keypad lock Select Menu > Settings > Phone > Automatic keyguard > On, and set the length of time, after which the keypad locks. Unlock the keypad Select Unlock, and press * within 3.5 seconds to access the functions in your device.
... lock the keypad. Set automatic keypad lock Select Menu > Settings > Phone > Automatic keyguard > On, and set the length of time, after which the keypad locks. Unlock the keypad Select Unlock, and press * within 3.5 seconds to access the functions in your device.