Cell Map plots the location and strength of all the cell transmitters that your phone is connected to. Just move closer to one for a better signal!
Cell Map can even locate transmitters that are too weak to make a call from, ideal for areas with poor signals.
3G and 4G connections typically only give information about one mobile mast, but switching your device to 2G will potentially allow you to view more cell sites and is recommended
Please ask questions or leave bug reports in the comments below, thanks.