If possible, please shed some light: I bought a 3GS 32GB 3.1.2 from a Craigslist ad. I tested it before I gave any money and it worked like a charm. It was obviously jailbroken because he had Streetfighter wallpaper and Cydia. Took it home, played with it a bit and decided I wanted to wipe it clean and start over, since it was filled with the text messages and movies and music of the guy who owned it. So I went to SETTINGS > GENERAL > RESET > ERASE ALL CONTENT AND SETTINGS and I left it over night but it never recovered. It was on the startup Apple screen with the little revolving gear underneath (except the gear was not revolving anymore. It was frozen). I can put it in UDF? mode and tried installing a modified ipsw file I created with PwnageTool but during the installation it quits and I get an error that says the following: [The iPhone "iPhone" could not be restored. An unknown error occurred (1600).] I am unable to get beyond this error no matter what I do. Does anyone have a solution for this issue? I've done a Google search and seen it posted but NO SOLUTION!! Anyone know of any solution for this? So very much appreciated!