Find "Phone lock"
Press the Navigation key.
Scroll to Settings and press the Navigation key.
Scroll to Security and press the Navigation key.
Scroll to Phone lock and press the Navigation key.
Turn use of phone lock code on or off
Highlight On or Off and press the Navigation key.
If it's the first time you turn on use of phone lock code, you need to key in a phone lock code of your own choice.
Key in the phone lock code and press the Navigation key.
If it's the first time you turn on use of phone lock code, you need to key in a phone lock code of your own choice.
Exit
Press Disconnect to return to standby mode.