Downgrade iOS 4.3.2 to 4.3.1, 4.3, 4.2.1 on iPhone 4, 3GS, iPad 2, iPad, iPod touch[How To]
Apple has already released iOS 4.3.2 for iPhone 4, 3GS, iPad 2, iPad, and iPod touch 4G/3G today. If you have not upgraded to iOS 4.3.2 yet, you MUST save SHSH blobs of iOS 4.3.1 before you update to iOS 4.3.2. In case you have upgraded to iOS 4.3.2 and now want to downgrade it back to iOS 4.3.1 / iOS 4.3/ iOS 4.2.1 / iOS 4.1 / iOS 4.0 / iOS 4.0.x, you have come to the right place.