Wireless Joint

I am at my wits end with this router, beginning of buyers remorse - short story is I am not getting 5G signal on router, plan provider swears it isn't a plan issue, MOFI Network on Reddit has no answer. I have put the router in my truck to a known 5G+ location and no 5G received.

Also, I have 2 of these routers with same cellular plan on each - only one gets and IPV6 address

Anyone else run into these issues?

I got one a week ago and never got it to work right. My 4500 was great, the 5500 9191 on the other hand not so much. I spend 3-4 hours messing with it and gave up and just returned it. I got a used MR6500 which works fantastic for one location. Just ordered a 520(x62) bundle off LTE fix for another location. Hoping that one works well.