Well I have a 3.1 3G S and I went and attempted installing the mobile config file you find at http://help.benm.at/help.php to enable tethering on 3.0. According to articles and event he site it self, it only works on 3.0 and that the way has been patched for 3.1. For some reason though, it's still working on my 3.1 Please Register or Log in to view images. Did AT&T activate tethering or did I just get lucky? lol.