Restore iOS Device(iPhone, iPad, iPod) Without BLOB and signed firmware

Come ripristinare iPhone/iPod/iPad a firmware non certificati da Apple How to restore apple devices without singed firmware Download firmware from http://www.felixbruns.de/iPod/firmware/ Download redsn0w: Windows http://tinyurl.com/c4dndg4 Mac http://tinyurl.com/d45de6u