I have received a series of unidentified repetitious hang-up calls on my home telephone. I called AT&T to complain about it and inquire of them what could be done about it. They first gave me a non-existent or inactive number to call -- and when I attempted to call the number, it was "out of service." Next, after going through the entire rotary allotment of steps to reach an AT&T representative again, the representative told me to register with the Do Not Call List; she gave me 1-888-4r82-2122 (Not a working number). The... read full review »