My only AT&T service is a prepaid "Connected Car" plan for the Mobley device. The Mobley is not listed on the "good" list, but neither is the Harmon "Spark" device that replaced the Mobley and is still offered. Back when I first set up the Mobley, the Connected Car plan was handled by a different department from the usual cell service folks. I also noticed that the Mobley shown on my "myAT&T" account is tagged with a green "Good to go!" label with no explanation of what that means. My Mobley SIM is currently in a Netgear 815s hotspot and continues to work ok,