I am switching BB units and I want to wipe my old one clean. I use google sync. So not sure if I should delete that? Never switched from one BB to another. I just don't want anything to remain on the phone when I give it to someone or sell it.
Then click the menu button on your BB and choose "Wipe Handheld". When you do that it will ask you if you want to delete Third Party Applications. If you want to, just select it to put a check in the checkbox and click "Continue". It then will ask you to type the word "blackberry". After you type blackberry, it will proceed to wipe everything on your device except the Operating System.
Before you do that, make sure you backup everything you want to keep!