A cellular monitoring system comprising an application on a plurality of mobile devices recording the strength of a cellular signal received at a mobile device along with a GPS coordinates of the mobile device at time of said recording, wherein said application transmits the monitored signal strength along with said GPS coordinates to a backend application executed on a server. The backend application consolidates the monitored signal strength and said GPS coordinates with one or more previously monitored signal strength and GPS coordinate and preparing a geographical map of the monitored signal strength to be displayed by the application on the mobile device.