About backing up and restoring device data
If you have installed the BlackBerry® Desktop Software on your computer, you can back up and restore most of your BlackBerry device data, including messages, organizer data, fonts, saved searches, and browser bookmarks using the backup and restore tool of the BlackBerry® Desktop Manager. For more information, see the Help in the BlackBerry Desktop Manager.
If your email account uses a BlackBerry® Enterprise Server, you might be able to restore synchronized organizer data to your device over the wireless network. To restore synchronized organizer data over the wireless network, you must have an activation password. For more information, contact your administrator.
Research In Motion recommends that you regularly create and save a backup file on your computer, especially before you update any software. Maintaining a current backup file on your computer might allow you to recover device data if your device is lost, stolen, or corrupted by an unforeseen issue.