1. Find "Passcode Lock"
Press Passcode Lock.
2. Select option
Select one of the following options:
Turn on lock code, go to 2a.
Turn off lock code, go to 2b.
3. 2a - Turn on lock code
Press Turn Passcode On.
Key in a lock code of your own choice.
Key in the same lock code again.
Press Require Passcode.
Press Immediately or the required interval.
Press Passcode Lock to go back to the settings.
4. 2b - Turn off lock code
Press Turn Passcode Off.
Key in the lock code.
5. Return to the home screen
Press the Home key to return to the home screen.