A little update:
Creating a hotspot with my cell phone isn't ideal as I would have to manually turn it on and off every time for the kids in the car to use. Leaving it on all the time drains the phone battery considerably, even when the hotspot is not used.
I removed the simm from the car; from my observations, it controls the traffic options in navigation, the cr web browser, the "LIve" features (weather, news, etc) and of courese, a hot-spot for the kids.
I looked throught the various phone plans and was able to get a tablet data-only share plan (share with my cell phone plan), which costs me $10 CAD ($7.50 US) per month and the provider included a extra 3GB free data per month. This costs consideralby less than the AT&T plan, offers more data, and I get to share the data with my cell phone. Everything works fine, so you do not have to choose AT&T to work with the Jag.
From what I read on other forums, cell providers don't like to offer these data plans; offically its only for use in a ipad or tablet.
Hope this helps.