I don't know how accurate RDFGS is. I only know for sure in Carroll county x-band is not used. RDFGS reports x-band in Charles, St. Mary's and Wicomico counties. 99% of my driving is in Baltimore city, Baltimore county, Howard county and Carroll county. I leave x-band disabled. When you first get your V1 leave x-band on to see what you get. It will be chatty in the default settings. Then when you figure out what your location offers you can think about customizing the V1's settup. Are you getting the V1 connection product?