I bought an iPhone 3G the other day from some guy I know. I was quite happy with the phone, it has his sim card in there. His number is showing up, and there is full signal and 3G Coverage. Whenever I try to make a call it says call failed, cant send texts. basically none of the phone works when it comes to sending texts/emails/internet/calls I've come to the conclusion it is blocked. If I jailbreak it will that unblock it? I paid a fair ammount for it, And I know its wrong to unblock it IF it was stolen. But he's not only cheated the person he stole it from, but also me! I heard jailbreaking would unblock it..