Key Lock
If you turn on this feature, all keys will be locked.
You can answer calls by using the 
key. But when you hang up, the phone returns to the locked mode. This feature is useful to avoid pressing keys by mistake.
To lock the keys, in the standby mode just keep
the 
key pressed till the display shows "HS
Locked", then the 
icon appears.
To unlock the keys, keep the 
key pressed
again till the key lock icon 
disappears from the display.
Note:
In locked mode, if you press any key, the phone will generate a warning tone, and the "HS Locked" message will be redisplayed.
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