I just picked up my new DROID 4 and have an issue. The standalone GPS does not seem to be functioning. When I turn it on, Google Maps fails to pinpoint my position. It says instead "location services not available." If I turn on the Google or Verizon location services I can get my location within about a 500 foot radius but this isn't particularly helpful. Is this a known issue? Should I be worried that I got a defective product? Looking forward to your responses.