I bought a iPhone 4G from a guy who said he tried to jailbreak the iphone but after the iphone didn't turn on again. If i try to restore it to 5.0.1 i receive the error 21, if i put it in DFU mode the Itunes force a reboot and the iphone gets back to Recovery mode (error 21 or 1600 again) If i try to use a CFW i receive the errors from 16XX range, after research i used redsnow and Ireb to put it in PWN DFU mode, but the Itunes gives me error 11 or 3194. With TinyUmbrella running i receive the error 11. I really don't know what else to do :\ It's a 16GB Iphone, GSM. Itunes 10.5.2, if anybody knows how to fix it let me know pretty please.