For each scan I ask the T-mobile coverage map what kind of coverage there is every .1 latitude and .1 longitude. For my first few scans what areas were scanned was inconsistent as I was only interested in b71. Over time I standardized on a set of points as water returns no coverage regardless of real coverage. For the 2018/08/29 scan I started scanning Hawaii and Puerto Rico. Due to my method it gives you a rough idea of what bands are used in what part of the country however it is not perfect.

Date 2g 3g b2 b4 b12 b71 n41 n71 Total Points Scanned