Lock the keys
When the device or keypad is locked, calls may be possible to
the official emergency number programmed into your
device.
The keypad of your device locks automatically to prevent the
keys from being accidentally pressed. To change the period
after which the keypad is locked, select
Menu
>
Tools
>
Settings
>
General
>
Security
>
Phone and SIM card
>
Keypad autolock period
.
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To lock the keys manually in the
home screen, press the left
selection key and the function
key.
To lock the keys manually in the
menu or in an open application,
press the power key briefly, and
select
Lock keypad
.
To unlock the keys, press the left
selection key and the function
key.