To change your password, choose the Password box, enter your current password, then enter the new password. To delete your password, choose the Password box, then choose Unassign.
Important: If your SIM card is locked and you enter the wrong PIN more than three times, your SIM will be blocked, and you must call your mobile service provider for your unique PUK (Pin Unlock Code).
Auto-Keyguard and touchscreen lockout
1.Press Applications Launcher 
.
2.Choose the pick list in the
3.Choose the Prefs icon.
4.Choose the pick list in the
5.Set any of the following preferences:
•
•Disable touchscreen when: The conditions under which the touchscreen disables.
Phone Lock
You can lock your SIM card to prevent unauthorized use of your mobile account. When your SIM card is locked, you must enter the correct PIN code to unlock it, even if you move it to a different phone.
1.Press Phone 
.
2.Press Menu 
.
3.From the Options menu, choose Phone Lock (/L).
4.Check the Lock SIM box.
5.When prompted, enter the current PIN and choose OK. Unless you changed your PIN code, enter the default PIN code, provided with your mobile service provider’s account materials.
6.If you want to change the PIN, choose Change PIN, enter a new PIN, then choose OK to accept it. Repeat this step to verify the new PIN.
7.Turn Wireless Mode off to activate the phone lock feature.
8.To turn Wireless Mode on again, press and hold the Wireless Mode button 
, enter your PIN, then choose OK to unlock your phone.
