Find "Security Wipe"
Press the Menu key twice.
Scroll to Options and press the Navigation key.
Scroll to Security and press the Navigation key.
Scroll to Security Wipe and press the Navigation key.
Restore factory default settings
Highlight Emails, Contacts, etc., User Installed Applications or Media Card and press the Navigation key.
When the box next to the menu item is ticked (V), the selected data will be deleted.
Highlight the field at the bottom of the display and key in blackberry
Scroll to Wipe and press the Navigation key to restore the factory default settings.
Follow the instructions on the display to set up your phone and prepare it for use.
Follow the instructions on the display to set up your phone and prepare it for use.