Rereading my question indicated I could have written it more clear.
I was looking for information like below.
"I didn't plan to use the data plan with Foreflight, but found too many instances of not having access to wifi. Like especially at the airport. Last week I flew 1,000 miles to CA and back and interestingly, discovered that even at 12,500 ft, the 3G signal hit often enough that it typically updated weather every hr or so. Turned out to be especially helpful when returning to OR with rain around the route of flight as the radar feature was current. Obviously not always dependable this way, but at least it can work while airborne."