Thank you for your thoughts and information.
I believe (if I heard it correctly), the device can go onto an existing data contract where the extra data fees would apply. Looking at my current monthly data total last month I was a bit under 1 GB (about 920MB) on the gateway port of the router. I have contacted my ISP and asked for some of the same numbers to check if they are similar to my router's stats, and if they have any updates planned. Will likely hear from them on Tuesday as it might be a holiday tomorrow.
Cell LTE bandwidth is almost non-existent in the house since we have steel siding and roof so it's basically a Faraday cage. I would have to use a USB extension cable from the router to the outside roof area and run the device inside a radome for weather resistance for permanent use. I have an unused Bell sat dish up there, am thinking of replacing the LNBF with the dongle at the feed point and aim it at the tower for maybe a few dB gain. I don't think there is a way to connect an external antenna to the device without breaking it open (from what I see in the pictures)
We can play video on the Samsung phone when outside in sight of the tower but only the old CDMA phone works in the house.
I tried a dongle a few years ago from MTS, and one from Rogers, neither worked well enough to use reliably even when we drove to within a mile of the cell tower(s) using a laptop.
Any use of this device (for me) would be on a trial basis only, if I have to purchase a 2 yr contract or buy the device before trying, it won't happen!
Was hoping someone on the forum here might have some experience with it... Guess not.