Not sure what I'm doing wrong. Just sold my iPad 2 (Jailbroken, 5.0.1) on Ebay. Need to clear and erase everything from it. Went into settings and tried the "Erase and Clear" option and the iPad just froze with the spinning white circle. Tried 3 times, same result. Now trying to restore via iTunes 10.6.1 with a downloaded .ipsw for iOS 5.0.1 and iTunes either gives me an error 11 or error 21. Quite frustrated. Any help is much appreciated!