I'm trying to extend my range for my DJI Phantom 3 Pro. I am aware that obstacles and buildings severely limit the range of a drone, however I'm looking to increase Line Of Sight distance. I've heard of other operators getting somewhere around 3-5x the advertised distance... How? The DJI GO App, from my understanding, limits the operator to 500m. Are people using a 3rd party app? If so, which one is the best in your opinion? Thanks for your responses.