Zte TELSTRA ROAMER User Manual page 12

HOW TO LOCK/UNLOCK THE KEYPAD
By default your handset is set to lock the keypad after 60 seconds, this
keyguard is designed to prevent you making unwanted calls when the
handset is in your handbag or pocket. See the Handy Hint below to
change this setting if required.
You can manually lock and unlock the keypad by following these simple
steps:
•
To lock the key pad hold down the star * key for 1 second.
•
To unlock, press the OK Key then press the star * key
•
Whenever the screen is locked a message will appear in the centre
of the screen
Handy Hint:
To adjust period of time for the auto keyguard or switch auto
keyguard on or off go to Menu > Settings > Phone > Auto Keyguard
Don't forget to press the centre button to activate the change
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