It is my understanding that the blue is 3g and the green is 4g. This map is made by people that have the app. Meaning that the area's that don't have any color have not been mapped yet. Basically the app on your phone will record where 3g and 4g are and then upload that data to the servers. Within 5 minutes of doing so, it will show on the map as having 3g or 4g in that area. Area's that don't have any color have not had anyone with the app in that area recording data. What you can do is turn gps on on your phone, make sure the app settings allow your phone to upload that data, and then drive around in an area that has no coverage yet on the map. You will see on your phone that the app is recording data. Once you are done, the data will be uploaded and within a few minutes, anyone with the app, will be able to see the coverage you just recorded. There were a few areas around my house that showed no coverage here in Ohio. I turned the app on and drove through those parts and now the area's on the map are showing coverage.
It really is a great app, but it counts on people with the app collecting the data as to where the coverage is. Both 3g (blue) and 4g (green.)
I hope this makes sense..
I drove from an area that has 4g, to an area that has only 3g. On the map the area that was 4g was green and as soon as I hit 3g, the area is blue. For those getting 4g in a 3g area on the map, make sure the app is running in 4g and map those area's.
