Setting a BlackBerry® 8830 Password
1.Click Options (
) > Security Options.
2.Click General Settings.
3.Set the Password field to Enabled.
4.Set the other security options and then click the trackball.
5.Click Save.
6.Type a password and then press 
.
7.Retype the password.
8.Click the trackball.
Locking and Unlocking the BlackBerry® 8830
To lock your BlackBerry® device:
▶With a password set, on the Home screen, click Lock.
To unlock your BlackBerry® device:
▶On the Lock screen, roll the trackball. Click Unlock. Type your password. Press the Enter key ( 
).
Note:
When the BlackBerry® device is locked, you should be able to make an emergency call without dialing the emergency access number, provided you are within range of a compatible wireless network. Click Emergency Call. Click Yes.