1. Find "Phone lock"
Press the Left selection key.
Select Settings and press the Left selection key.
Select Security and press the Left selection key.
Select Phone lock and press the Left selection key.
2. Turn on use of phone lock code
Select On and press the Left selection key.
Key in the phone lock code (default is 12345) and press the Left selection key.
3. Turn off use of phone lock code
Select Phone lock and press the Left selection key.
Select Off and press the Left selection key.
Key in the phone lock code (default is 12345) and press the Left selection key.
4. Return to the home screen
Press the Home key to return to the home screen.