I've finally gotten a chance to get back in the air with a replacement P3 Professional that I purchased several months ago (long story). I successfully paired the new drone with my original controller, but the system forces me to go through an activation process. Fine. Unfortunately, it comes up with... Activation Failed Invalid Device! Please Contact DJI Support It's a brand new system, fresh out of the box. I've power cycled everything... the RC unit, the drone, and the cell phone (a Samsung). My God, this is annoying.