To compare cell phone reception between mobile phone service providers, go to RootMetrics.com and click the Coverage Map button. Alternatively, visit OpenSignal.com to compare wireless phone services using a heat map.
As of 2015, RootMetrics.com provides coverage maps for over 40 wireless phone carriers in the United States. The coverage map compares cell phone signal reception in five categories: untested, bad, poor, fair and good. In addition to call performance, the map also displays estimated cell phone Internet speeds. Root Metrics is an information services company located in Bellevue, Washington.
OpenSignal.com provides a heat map utilizing data from various wireless providers. A heat map is a graphical representation of data on a geographical map.