1. From the home screen, press the Right soft key.
   
2. Scroll to the 'Settings' icon, then press the Center nav key.
   
3. Scroll to 'Security', then press the Center nav key.
   
4. To toggle Password security on/off, scroll to 'Activate Phone Code', then press the Center nav key.
   
5. Enter the required password, then press the Center nav key.
   Note: The default password is '1234'.
   
6. To change the password, scroll to 'Change Phone Code', then press the Center nav key.
   
7. Enter the current password, then press the Center nav key.
   
8. Enter the desired new password, then press the Center nav key.
   
9. Re-enter the chosen password, then press the Center nav key.
   
10. After powering on your phone, enter the chosen password, then press the Center nav key to unlock.