I have been using my rooted AT&T Samsung Note 2 as a wifi hotspot via Wifi Tether - TrevE Mod for over a year now without having to purchase one of AT&T's tethering plans. It has worked great and AT&T never seemed to know I was "sharing" my phone's data plan with my laptop. But yesterday I got a letter from AT&T stating that they know I'm doing it and that I have to purchase a tethering plan. That if I keep doing it and don't purchase a plan by the end of the month that they are going to automatically start billing me and switch me to their crappy limited data plans that include tethering. That I would loose my grandfathered unlimited data plan forever. Has anybody else received such a letter? Are there some settings I can change in the wifi tether - TrevE Mod app so they will once again not be able to see that I'm sharing my data plan with myself (so dumb...)? Is there another app I should use? Is there a system app I can freeze? Please, anybody have any ideas or work arounds for this situation? I really appreciate any advice.Thanks!