Comment Large screen and maybe a SIM card (Score 1) 129
Get a popular name brand tablet and you should be fine.
You can get one that takes a SIM card.
The larger the screen the better.
Since you're used to Android, there is likely no reason to change.
You could try a Samsung, but don't opt in for any of the Samsung add ons.
Try to keep your tablet as base Android as you can.
When it gets old and unsupported, you could consider installing something else on it (who knows, maybe Ubuntu).
Such ROMs are only released (i.e. figured out) for name brand tablets that lots of people have.