Hey there. I recently received an iPhone 3GS from my friend. They had taken it into a shop to be unlocked so I could use it with my sim card. However, it was unlocked to iOS 4.1. As all the apps I attempted to download required 4.2 or higher, I decided to restore the phone and attempt to unlock it myself to 5.01 (and when that failed 5.1) I've tried several version of redsn0w and encountered several problems. Sometimes a message comes up saying 'the device does not support untethered jailbreak' and the process continues, or it gets to the point where lines of code scroll down the screen before saying 'no successful firmware download'. I've researched solutions for both these problems and nothing has worked. snowbreeze seems to work, but when attempting to restore to the custom snowbreeze firmware in iTunes I've encountered errors 3194, 2005 and 1600. No solutions to these errors have worked. I don't know what else to do. Any help would be great.