Cash reward: Can't get service with 2g iphone(after being jailbroken)

Apple, Phone & iPad Forums,ews, Mods, Guides, Themes, Skins, and Downloads is what we do We reset ouretwork settings as well, same results. ATT said the phone is 300+ days out of warranty so she basically told me to **** off. What am We doing wrong We have jailbroke it successfully but just can't get service. We have a valid/working 3g sim card. It works fine with our regular phone(G1). Wish We would haveever deleted all her settings and just went from there.
Apple, Phone & iPad Forums,ews, Mods, Guides, Themes, Skins, and Downloads is what we do . Yes, its Jailbroken via Blackra1n method. We tried to restore, well you mean reset the iPhone dont ya Well reset didnt work for me, it crashed our iPhone and booted into Safe Mode. PS: Im on 3.1.2, so if We restore it via iTunes, We might end up with a 3.1.3 Firmware which isn't Jailbreak-able.