I just yesterday added the Ascent to our 2 phone 12gb AT&T data plan for $10 a month. The car will now share the 12gb with our smart phones, no additional data. You have to go with the $20 per month plan to get "unlimited" data, which I believe is throttled after the first 22gb. Using our phones in the car used the data plan with or without the built-in Wi-Fi hot spot but hoping for a little better range in fringe areas because of the car's more powerful cell radio.
Wait- so the only thing I lose if I don't get another dang phone line is wi fi hotspot within the car?
What about Starlink SOS, and most especially- Starlink remote Start? How do they connect if not through ATT?