Nokia 2135 - Manual (Page 17)

16
■ Keyguard
The keyguard locks the keypad to prevent keys from being
pressed and calls from being made accidentally.
To lock the keypad, select Menu, and press * within
2 seconds.
To unlock the keypad, select Menu, and press * within
2 seconds.
If the keypad is locked, it is unlocked automatically when you
receive a call. After the call, the lock automatically
reactivates. When the keyguard is on, calls may be possible to
the official emergency number programmed into your phone.
In the standby mode, select Menu > Settings > Phone
settings > Automatic keyguard > On to set the keypad to
lock automatically after a preset time delay. Select Off to
deactivate the feature.