I'm trying to take my iPhone 4 GSM from 5.0 (tethered with redsn0w) to 5.0.1 untethered and I can't seem to nail it. I'm trying to preserve my baseband here also because I rely on the unlock. Tried the newest redsn0w as well as Pwnage Tool 5.0.1 Downloaded iPhone3,1_5.0.1_9A405_Restore, put it into redsn0w and pwnage, but when I enter pwned DFU mode and then option + restore with the custom ipsw in iTunes, it eventually errors out at 1600. Whats going on here? Am I missing a step?