I tried to install Siri on my iPad2 running iOS 5.1.1 after watching a video on youtube. i did add the source and install but after rebooting, my ipad is not starting anymore! I have only apple logo in a black screen and nothing more! CAN ANYONE HELP ME TO SOLVE THE PROBLEM??? otherwise, if I restore and upgrade to iOS6.0.1 then there won't be any jailbreak!!!