I don't how good ATT has neen for other Tesla vehicles but its been a joke in Memphis, TN lately. Map data loads in patches and streaming radio constantly has loading errors. I have corrected the isdue by keeping my T-Mobile hotspot active in the car and use it instead. Now my map data loads quickly and my streaming radio doesn't display a loading error hlfway through a song. I don't know who at Tesla thought it was a good idea to go with ATT but they should be fired. Verizon would have been a much better choice.