Is there any way to get around needing a data connection for the GPS to work? I just went on a trip and realized that I couldn't use the GPS because I had no data connection. It did find a connection at one point and downloaded the map, but when i exited out (accidentally, and it was obviously a bad idea...) it was gone, but at least my route was still there. However, when i tried on the way back, it kept trying to find the route and wouldn't even give me directions without a map. Shouldn't there be a way to download maps and store them on the SD card or something?