How to update or downgrade my iPad 3 that has a jailbreak?

ios itunes ipad jailbreak

you can not use SHSH on this device. only ipad 1 or ipad 2, nothing newer. if you need to restore you'll be forced to the latest IPSW apple is signing for that device. at the moment this is 7.0.4 if it's an ipad 3.

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