I have used A T & T for the past several years and the service has been great.
The router isn’t set up in the best location in the house making signal for WiFi weaker and much slower in the living room which isn’t even far away from the router. I have had to restart the router a couple of times because I couldn’t connect my speaker to my WiFi. And I can barely watch tv in the living room due to the WiFi connection going out.
It's been just a month of service, but we're very pleased with the service so far.