So I was previously jailbroke my 3gs going from 3.1.2 to 4.0 and everything was going good. Then a month later, I decided to restore it and now im on 4.0 unjailbroken and I can't activate it. I don't have access to any sims that activate the phone or anything. So is there a hacktivation for 4.0? My 3gs has the older bootrom.