Earlier quoted context omitted.
Care to elaborate more on this?
> For two months last year, researchers at the University of Washington paid drivers of an unidentified ridesharing service to keep custom-made sensors in the trunks of their cars, converting those vehicles into mobile cellular data collectors. They used the results to map out practically every cell tower in the cities of Seattle and Milwaukee—along with at least two anomalous transmitters they believe were likely st…
Once you have a number pop up on the Stingray you distribute that person's photo to all the border agents.