LTE (Long Term Evolution) is a standard for wireless broadband communication for mobile devices. LTE-A (Long Term Evolution-Advanced) is a major enhancement that allows for the combining of multiple LTE bands for increased speeds and better performance.
Is it fast? The Airstream Smart Control and Airstream Connected systems were designed to give you broadband streaming capability anywhere that you can get a reliable signal on the AT&T network and free from 2.4Ghz interference. The system is designed to provide enough speed to stream multiple devices while using little power with secure data. See more on Smart Control Technology here and Airstream Connected here.