With my iPhone I get a little cell phone logo on the monitoring screen (Upper right of the box for the Online / Offline) and and IP address that I can toggle back and forth from.
With the LTE stick I get nothing. The stick powers up and connects to the network but the Web Presenter doesn't see it as a valid network source.
I'm pretty sure the USB stick is in the right mode because my Teradek Cubes recognize it as a LTE modem and stream data out over it. The Web Presenter doesn't see it though. It must use an unsupported protocol or like you said, it's in a mode that the web presenter doesn't like. The iPhone worked fine though.