i just bought my ipad 3 wifi+3g 5.1.1, couple of weeks now and i jailbroke in a haste, now i am not satisfied with the result because it seems it lags and not smooth especially when i scroll unto the spotlight search, so i want to undo or reverse the jailbreak. it is possible to restore it to its default factory settings as if it is newly buy? And lastly, if i will update it to 6.0 is it ok? thanx in advance. I really appreciate it.