I have tried to Google this with no luck. I am looking for some maps for the GPS to use when I'm out of cell coverage. I live on the coast and have limited coverage on all Cellular networks. Though I did notice that my Droid X was able to monitor my speed and heading, and the screen moved and rotated keeping track of my driving progress; but there were no maps displayed because I lost cell reception. I have a stand alone Garmin Nuvi that I normally used untill I received my Droid, and even when out of cellular coverage, the Droid tracked my perfectly when compared to my Nuvi, except no maps! So is there a TomTom or other mapping software that can be installed for use when out of cellular coverage.