3 calls to OTR multitude of suggestions, nothing worked. They suggested the problem was with the Winegard unit. Called Winegard, first words out of the support person's mouth, was I using a resellers sim chip. When I answered yes, she said, even if I could get it working, it wouldn't stay working. When I asked why, she said they do not correctly provision the sim card and go directly to the cell company.
Sent wife down to AT&T store (I was working), tech at the store called me to understand what I had done, and developed a plan to get the unit set up. Immediately worked, unlimited data, at almost 1/2 the cost of OTR. I'm going to wander back down to the store and get a sim card for my house internet and drop OTR.