Your phone
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■Keypad lock Select Menu > * quickly to lock or unlock the keypad to
prevent the keys from being accidentally pressed. To answer
a call when the keyguard is on, press the call key. When you
end or reject the call, the keypad remains locked.
Select Menu > Settings > Phone > Automatic keyguard >
On to set the keypad to lock automatically after a preset
time delay when the phone is in the standby mode and no
function of the phone has been used.
When the keypad lock is on, calls still may be possible to the
official emergency number programmed into your device.