Hi Everyone,
i have posted on the IPAD forum and now i'll post it here on the Iphone 4s with IOS6 upgrade
Go to Settings, General, About
Scroll down till you see Modem Firmware
Reply Back with your Modem Firmware
Modem Firmware: 04.12.02
If your Modem Firmware is LESS than the above, then you have the same problem as myself and many others with Wireless Connectivity issues to WAP's
It is my understanding, unless im proven wrong by anyone with my above findings, this can only be fixed by APPLE. I have reported this as a BUG