I recently bought an iPhone 4s off amazon and it comes with iOS 5. I updated it to iOS 6 soon after and so far it has been a great experience, that is until this uber-huge bug happened. Every time I go to the app store the 4s will freeze, random stripes will appear on the screen and it will reboot. Now I can't download any apps and I can't get of this bug. I tried a reset and it did nothing. I even reinstalled iOS 6 and it also did nothing. Now I can't download any apps and I can't revert to iOS 5. Any help?