Kathy, I am using voice over internet now and I can't tell the difference between this and a land line. Absolutely no difference whatsoever as you use the same phones that are in your house now. The quality is the same if not better than my old land line. Had I not been here when the cable company installed the new modem for the phone, I would not know I had VOIP.
What does ATT use for TV, is it satellite?
