Jailbreak iOS 4.2.1 Guide for iPhone 4.2.1, iPod touch 4.2.1, and iPad4.2.1 - QuickPWN

Does this work with IPAD that is already Jailbroken 3.2.2? If you have a JB Ipad 3.2.2 do you just upgrade to 4.2.1 and follow the instructions above? What happens to Cydia, L1merain, and any other Cydia packages loaded in the 3.2.2 jailbreak? Will this w

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