https://en.wikipedia.org/wiki/Mobile_virtual_network_operato...
one services towers on the ground. base stations. maintenance. physical network deployment
the other is the services of running the network. roaming agreements. customer management. internet breakout
tesla and other vehicle makers may see value owning the service side but very unlikely they want to maintain a network
I doubt Amazon has many towers of their own here and are almost entirely through one of the telecoms.
It looks like Amazon is sending you base stations to set up a private network in one location.
Their offering page specifically says that AWS "delivers your network hardware (small cell radio base-station and servers) Attach power and internet connectivity to smart cells and servers"
They are not using telco partnerships here, or at least if they are, it's not on the level of carving out a chunk of the telco network for private use.
I struggle to see how this remains a "cloud" offering rather than a hardware rental.