@christianjou, told ya!
Of course, having clear terrain & clear space for miles around must help quite a bit, his S/N ratio must be superb. I really envy Uncle Fester, those high-altitude shots are awesome!
Setting TX to CE or FCC mode, see DJI Tutorial here: http://youtu.be/tUT2jzAO81U
iDrone

Setting TX to CE or FCC mode, see DJI Tutorial here: http://youtu.be/tUT2jzAO81U
iDrone