My company let me expense for super low end cell phones from 7-Eleven and put each one on a different MVNO. Once a year I take them into the actual places wher

My company let me expense for super low end cell phones from 7-Eleven and put each one on a different MVNO. Once a year I take them into the actual places where our users will use the web sites To see how the web sites perform. The visitors are 70% mobile users, and I shadow a few of them in the locations where the sites are used, like parking garages and basements and industrial buildings with lots of opportunities for interference. Very illuminating. And I suspect more accurate than many of the bad connection simulators I've seen.