I just bought an IPhone 3gs from ebay and the person told me that he was running it on 3.1.3 and never jailbreak it. The phone is currently in recovery mode. (Itunes with USB showing) I tried to download Itunes 9.1 and jailbreak it with 3.1.3 and pwnage tool but getting 1600 errors... Please help me I have tried to get it through 3.1.2 but still doesnt work...Please Please Please help I dont know what to do. I have older bootroom and i want to put IoS4 and unlock it for Tmobile.