Seller on eBay claims he put copper shielding on his phantom to "improve reception" but claims a loose compass wire is why he gets no gps. Hmmmm:
http://www.ebay.com/itm/DJI-Phantom-2-v ... 2a4bec5ff4
http://www.ebay.com/itm/DJI-Phantom-2-v ... 2a4bec5ff4