Newbie pilot, here. Maybe 30-35 flights, flying in Phantom mode. Today I was at about 200 feet distance and about 900 feet altitude and lost control signal. RTH works flawlessly. This has happened 2-3 times before. Batteries fully charged, extender pointed at copter, TX antenna pointed pretty much straight up, that is, TX held at slight angle so antenna bent upward hitting my cell phone. No outside interference that I experienced or noticed. Do I need to be in NAZA to get the distances you guys are posting? Any other ideas?