They seem to be branding LTE as even better than 4G. My phone has an "LTE" indicator on top most of the time, but it switches to "4G" when I'm in a basement pa

They seem to be branding LTE as even better than 4G. My phone has an "LTE" indicator on top most of the time, but it switches to "4G" when I'm in a basement parking garage with lousy reception. I'm not sure what these terms mean, and the phone/service didn't exactly come with a user manual.