Before we get into dissecting a recent report from the Open Signal Maps database, here is what you need to know about the originators of this report: the Open Signal Maps database is an open (duh!) project that has assumed the task of creating coverage maps of 2G, 3G and 4G coverage, as well as Wi-Fi access points throughout the world. For now, such maps are only available only for the US, UK, Italy, Germany and Spain, but OSM is hard at work to extend its reach.
Downloaded and installed on almost 700,000 Android devices during the last six months, the OSB Android app sends signal information back to the database from the devices it is installed on. In return, users [...]