I use a "Enco B039" android-run in-dash car stereo. When using the gps the speed I drive in is showing double the speed. So if I'm going 50km/h the gps software tells me I'm going 100km/h and so on. All the settings in the software are set to km/h so I suspect it's the android system that communicates with the gps-module fault? I read in another forum of a guy that discovered that his android phone was giving him the speed reading in nautical miles (nots). Maybe this is whats happening with my unit? I found the system file "gps.conf" but I can't see any settings in there that I can change when it comes to speed. Any suggestions? In what file in the system is this setting located? Cheers.