About the smartphone password
If you set a BlackBerry smartphone password, you'll be prompted to enter your password to unlock your smartphone.
If you forget your password, it can't be recovered. If you exceed the number of allowed password attempts, your smartphone deletes all your smartphone data for security reasons and you'll be prompted to set a new password. If your smartphone uses a BlackBerry Enterprise Server, depending on the IT policies that have been set by your administrator, data on your media card might be deleted as well. For more information, contact your administrator.
Research In Motion recommends that you regularly create and save a back-up file on your computer, especially before you update any software. Maintaining a current back-up file on your computer might allow you to recover smartphone data if your smartphone is lost, stolen or corrupted by an unforeseen issue.