2.2.1 3G, legit carrier. 3G internet just doesn't want to work even though I restored to clean unjailbroken 2.2.1, still doesn't work, even though my carrier activated the 3G internet service twice, its just not workin, even though I have full signal, and no dropped calls. I jailbroke it, and stuff, but still, no internet.
Do I have to enter some settings somewhere?

HElp!