I am experiencing problems using my iPhone 4S as a personal hotspot with iOS 6.0. I had no problems before I upgraded. Today, I finally took my phone to the Genius Bar in Grand Central, but was told iOS 6.0 does not have genius bar support yet. They would not even look at the phone. I called AT&T and they said there are no issues on their end. I called 1-800-myapple and am waiting for a call back. I was wondering if anyone else is having problems with tethering in iOS 6.0. I currently have the beta 3 build on my phone but the problem existed in betas 1 and 2 since then. If there is anyone out there experiencing this problem, please let me know. And if anyone has a recommendation on how the problem can be corrected, I would greatly appreciate it. Thanks.