Should you ever decide to sell or give away your BlackBerry 8900, understanding the proper way to wipe your device may save you a great deal of hassle. Unless you wipe your device correctly, private information such as your passwords, email addresses and contacts could be recovered and used for malicious purposes. Fortunately, the procedure for wiping all personal information from the BlackBerry is not difficult.
Press the “Menu” button on your BlackBerry’s home screen. Access the security menu by scrolling down and selecting “Security Options.”
Click “Security Wipe” and check the boxes for “Emails, Contacts, Etc.” and “User Installed Applications.”