Ach you are way ahead of me. The hot spot thing only occurred to me the other day just before I saw your post. It works - not fast, like, maybe 3M/s. When you think about it, phones already have to transmit so it just uses that, but kind of neat.
Of course the whole point is having something that works out of cell range (offline maps) so assuming the main purpose of the tablet is nav, it really doesn't help anything.
And a phone will do the same thing a tablet will do, just, phone memory is pretty small, and, big screen is nice.
I returned the 64G A8, swapped it for 128G A8, because of sales the price was identical. Didn't get extra storage because 128G is huge, I doubt I'd ever use it all, maps aren't that big. If I do I can get 512K for like $30.
I hate spending but it was $350 regular price, sale price $180 so I figure if I were ever going to get one, now is the time.
As to SIM, there are lots of vids showing A8 with place for SIM but I'm pretty sure those are -not- US models those are foreign. Just as per hot spot - which can work - I decided SIM really doesn't help me, it's cool, but this is pretty much a one-purpose item (for offroad). That said, they are nice for use at home for news etc, where you have wi-fi.
Hope that clears up my previous mangled post about it. I still need to get the protector case for it and figure how it'll mount in the truck. Does the screen protector not interfere with the touch screen operation?