Downgrade to 4.3.3

http://www.redmondpie.com/downgrade-ios-5-to-4.3.3-4.3.5-on-iphone-4-3gs-ipad-2-ipad-1-ipod-touch-how-to-tutorial/

http://www.redmondpie.com/download-ios-4.3.3-for-iphone-ipad-ipod-touch-direct-links/