I used my ipad mini 1 so far with the phantom 4. There was never an error with incompatiblitiy, and I can fly with it. However, I notice that the video signal is very choppy and when the copter moves I often see green/pink artifacts all over the screen (both with hardware decoding turned on or off). Could it be that the hardware is not good enough for the DJI go app? I consider upgrading to the ipad mini 2. Or alternatively, what is the cheapest android tablet that will run DJI GO and Litchi smoothly?