If your like me you may have failed at trying the exploit for the iOS beta and decided that patients was a virtue. For those of you who upgraded to iTunes 10.5 and iOS 5 here is how to rescue your now overly expensive paper weight. First Uninstall iTunes Simply do this by removing iTunes from your application folder and deleting it (the trashbin should do just fine). Then Install iTunes 10.3 http://www.apple.com/itunes/ (this should generate an error which i show you how to fix later) Now for the tricky part as your itunes library database has been upgraded to the iTunes 5 standard Go to ~/Music/iTunes/ (aka /user/[your user name]/Music/iTunes) Rename your [iTunes Library.itl] to [iTunes Library.bak] (DO NOT DELETE ANYTHING) Then go into the folder "Previous iTunes Libraries" There you will find a series of files with dates in their names the latest date was made when you upgraded your version of itunes and should have .itl on it while the others do not copy it into the parent folder ~/Music/iTunes/ and rename it [iTunes Library.itl] now run iTunes IF YOU WHERE A DUMMY LIKE ME AND UPGRADED YOUR PHONE you can now downgrade your phone simply by using restore (though you may need to boot your phone in DFU mode) as iTunes 3 only lets you upgrade to version 4.3.3 anyway. I tested this myself and it works like a charm, all in all about 30 mins work given the speed of your computer.