hey, I have a jailbroken 4s, running os 5.1. I have a visit to the apple store tomorrow and would like to 'unjailbreak' it. i have backed it up already.... ... trouble is, i understand that i need to now Restore it. I am only given the option to "Restore and Update" it --installing ios6-- which i would really rather avoid for the time being! is there a way to restore my iphone to ios 5.1? or can i revert to it's current state after my apple store visit by restoring to the backup i just made? thanks, r.