I'm having the exact same problem with my iphone 4s and my wifes iphone 4s. After IOS 6 update we cannot connect to our home network. I can connect to my two networks at work, one is secure and another is insecured. I get the message unable to connect. They were both working fine on our network before the update. I've tried reseting network settings, changing http proxy to auto, resetting my router, toggleing wifi button on and off and about ten other things suggested on different message boards. This is very frustrating and would hope Apple will adress this issue very quickly.