So I did this hack according to both posted instructions, killr and ashad0509 and tried all sorts of comboinations of the settings posted from using the username and password to not to using :80 after the proxy to not and I still get the red exclamation. I did call att and they said the opt out wasnt on my account it should be ready on the 25th. Also talked to someone online via chat and they told me the same thing. I did at one point earlier today see a switch for tethering to turn on and off and explained how to hook it up via usb or bluetooth. I do not have that setting anymore after playing with the settings more. I have unlimited texts on an individual plan. Also I'm in NY and so far from what I've read online it seems to be working for most people west of here. Havent seen any east coasters working yet.
Any ideas?