Hi all. As the subject line, my 4s, along with that of a friend, became completely useless after doing the iOS 9 over the air update. My phone started briefly but when I did the slide to setup, it went through a few steps and then locked up. Nothing happens, even after connecting to iTunes on the PC. iTunes doesn't even seem to recognize it as an iPhone. What to do, other than keep bragging about how awesome the new OS is so far?? LOL Thanks!