To permanently unlock your SIM card:
1.Press Phone/Send 
.
2.Open the menus 
.
3.Select Options, and then select Phone Lock.
4.Uncheck the Lock SIM box.
5.When prompted, enter the current PIN and select OK.
Locking your smartphone
To protect your personal information, you can lock your smartphone so that you need to enter your password to access any of your information or use other features of your smartphone.
1.Go to Applications 
and select Security 
.
2.Select the Password box.
3.Assign a password and a password hint.
4.Select the Auto Lock Device box.
5.When prompted, enter your password.
6.Select one of the following options:
•Never: Prevents your smartphone from locking automatically.
•On power off: Locks your smartphone when you turn off the screen, or when it shuts off with the
•At a preset time: Locks your smartphone at a specific time of day.
•After a preset delay: Locks your smartphone after a period of inactivity.
7.Select OK.
Important: If you lock your system, you must enter the exact password to unlock it. If you forget the password, you need to perform a hard reset to resume using your smartphone. Performing a hard reset deletes all the entries in your smartphone. However, you can restore all previously synchronized info the next time you sync (see “Synchronizing information” on page 28).
To lock your system manually, select Lock & Turn Off, and then select Off & Lock.
