Apple released iOS 4.3.1 with a lots of new features and bug fixes over iOS 4.3, many of you already updated to iOS 4.3.1 and used an untethered jailbreak which is buggy and most of Cydia apps are incompatible at the moment. Following are the instructions to downgrade your iPhone, iPod Touch or iPad running on iOS 4.3.1 to a lower firmware version i.e. iOS 4.3, 4.2.1 or 4.2, just make sure that you had saved your Cydia SHSH for the firmware you want to revert back.
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