BlackBerry 8520 hard reset
Delete all device data
Verify that you have a backup copy of your BlackBerry® 8520 device data.
CAUTION: If you have turned on content protection, the process for deleting all device data can take up to an hour to complete. You
cannot stop the process after you start it. If you reset your device, the process continues after the device restarts.
1. In the device options, click Security Options.
2. Click General Settings Security wipe.
3. Press the Menu key.
4. Click Wipe Handheld.
5. To delete all third-party applications from your device, select the Include third-party applications check box.
6. Click Continue.
7. Type blackberry and OK.