Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3) As the title states, I've recieved the tethering letter from AT&T. I then spoke with AT&T and from what I have gathered, they are able to detect the use of tethering. As far as I know, mywi has been detected and now, so has tetherme. In speaking with AT&T, as long as I do not tether anymore, I will retain my unlimited data. Just wanted to give a heads up and see what others thought. It appears the "fun" is over.