OMFG..... I bought a used 3GS on ebay. The dude told me it was unlocked and jail broken and that I could use it on my non AT&T service. I get the thing in and put my SIM in it from my old 1st gen iPhone that is running jail broken and unlocked (3.1.3) on my non AT&T service but it doesn't do anything, it's like the SIM isn't in it. So I found a program called forecast and it tells me I can't unlock or jail break it!!!!!!!!!! It says something about SHSH but I have no clue what that is or what it does. Never even heard of it before. I saw a lot of talk about a program called Spirit so I tried that too but it just fails. What can I do??? Oh, I don't have a mac, all I have is Windows 7.. Wish I had a Mac. Please someone tell me I didn't get messed over on this purchase??????!!!!! I'm stuck!!!