Hello, So I would like to start off by saying I purchased this from a friend who got it in this. I have messed with it for the whole day and I have had no success so if I'm tired and upset. I thought it would be an easy fix. Here is what I did so far. iPhone 3GS -tethered jailbroken (I am assuming because iREB didn't work) -On 4.2.1 firmware (I tried other custom firmwares and my iTunes prevented it) -latest iTunes -might be on higher baseband because every way I tried didn't work Now onto the stuff I tried. 1) I tried restoring normally. I got 1015 error. 2) Downloaded 4.2.1 custon firmware 3) Downloaded iREB 4) First I tried kicking it off then I put it in DFU mode 5) I held shit+restore and tried the custom firmware but it was a failure. I now got 1604 error code. 6) Got redsn0w and official 4.2.1 firmware but redsn0w didn't read it. It only read custom firmware. 7) So far I have pwned DFU modded the iPhone now I tried restoring again and I got 1604 error code yet again. PLEASE HELP ME! I thought this would be an easy fix and I would get lucky on this iPhone. I bought it for 40 bucks and it is supposedly unlocked as well. I plan on getting a bunch of those free text apps so I don't plan on taking advantage of its unlock. HELP WOULD BE GREAT! THANKS IN ADVANCED!