Apple has stopped signing iOS 4.3.3 firmware through iTunes software. Few days back, the company released iOS 4.3.4 to patch some serious security flaws. With the arrival of new software, they follow their standard practice of stopping the previous firmware signing and only letting the users to update to the latest version.
However this is considered as bad for the jailbreakers who always want to update, restore and downgrade to the iOS version on which some jailbreak solution exists.
Remember we always warn you and post articles telling you to save SHSH blobs of every firmware version you use.
Those of you who have updated to any iOS 5 beta version without having SHSH hashes saved also cannot downgrade back to iOS 4.3.3. They can downgrade to iOS 4.3.4 on which all jailbreaks are patched by Apple including the iPad 2 jailbreak using JailbreakMe. Although a tethered jailbreak solution exists using Redsn0w 4.3.4.
If you are already on iOS 4.3.3, you are advised not to update to iOS 4.3.4. Just do not do anything and enjoy your jailbroken device.
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