A Few days back I bought a Nuvi 855 and updated the map software and also the firmware. I used a utility called Mapsource to create routes and uploaded them into the Nuvi 855. I also used turbocccâs program to increase the volume level and also to change a few words in it. But now the screen hangs every now an then. It takes a lot of time to load the POI results. It is also having a very slow refresh rate and taking a lot of time for calculations. What has gone wrong? Why is it acting so weird?
