OK.  I've had a nexus 7 since August and never had this problem.  For some reason the location service (using GPS?) is putting my location in Yangpu, Shanghai, China instead of New Mexico, USA -- a difference of nearly 9000 miles.  Why would it be doing this?  I've tried to sort out location settings on the Nexus 7, but nothing is effective, unless I turn all location services off (and just tell it where I am). Sometimes I realizes I am in New Mexico, sometimes it says I'm in Shanghai.  What could be telling it that I am in Shanghai? What is going on?  Hoe can I fix this?  Any thoughts or ideas?