If you are asking about the Facebook app by RIM, you need the data plan for BlackBerry and not a regular mobile data plan. You need the BlackBerry data service to use RIM/BlackBerry apps.
Ask your mobile service provider. BlackBerry data is usually in place of regular data, not in addition. That is, if your service provider supports BlackBerry. Posted via BlackBerryForums.com Mobile
Last edited by aiharkness; 07-03-2011 at 06:33 PM..