What you could do is just use a MOFI router from the company that doesnt use wireless and just connect it to a normal router via an ethernet cable i guess. You can always just make your own subnet no matter what connection type you have, and simply route all internet traffic into the other network from that subnet.

But if you can find a way to just get your own MOFI router that’d be better. I don’t know much about that stuff so couldn’t say.