So I got ripped off on eBay. I sent a buyer my new, unlocked 3GS, they returned it, except it isn't the same one I sent out. It's a scratched up old 3G. And it says "No Service" all the time. I'm in the middle of trying to get my money back, but in the mean time I really need a working phone. The new mystery 3G says "No Service" when I put any of my SIM cards in. It is jailbroken, with the old bootrom, on firmware 3.1.3. For some reason, it doesn't show ultrasn0w installed as a package in Cydia. What do I need to do to get the phone working again? Just install ultrasn0w?