I am in the same boat, it keeps telling me I am in China, and of course, I've done the whole GPS test routine, put the external antenae on, gone outside, held the "battery side" to the sky, etc. No luck. So if you have a suggestion, please let me know, becasue I am definitely not in China, and am in Anchorage, Alaska. I need the GPS to work so I can get my maps working. HELP.
If you have GPS Status installed, have it reset the GPS data and then set the tablet outside for at least a half hour and see if it can find your location. It may take a long time to find your location in Alaska.