I have an iPhone 3GS and would like to jailbreak it. I have tried Blackra1n and Pwnage tool 3.1.4 and nothing is working. In Blackra1n it will show the GeoHot logo and then go into DFU mode, making me restore. With Pwnage tool I tried restoring from the Custom Firmware and iTunes gave me the 1604 Error. What am I doing wrong? Any help is appreciated. Thanks!