Hello, i just got and iPhone 3gs off of craigslist and want to jailbreak it. I know it has an old bootrom. I have tried jailbreaking it with sn0wbreeze, but i get the error 1600 and 1604. I have also tried this and i can't get the ecid.shsh to be 64-66 kb. I don't know if by "SHSH blobs" it means that you have the official ipsw from i tunes that was on your iDevice from earlier(3.1.2)(because i don't), or just any ipsw that you can find on the internet? Any and all tips will help. Thanks. P.S. i have searched for about 2 days for threads about this and can't find any.