Samsung SCH-1530 - Manual (Page 73)

5
Advanced Features
65
KeyGuard
The KeyGuard feature is available in Standby mode to prevent
accidental dialing while the phone is on but not in use.
KeyGuard also prevents excess battery drainage, because the
phone does not respond to keypresses or activate the backlight
when KeyGuard is on.
To activate KeyGuard:
1. Press to display the Main Menu.
2. Press for KeyGuard. The keypad locks, and
“KeyGuard” displays.
3. Press , again to deactivate Keyguard.