I have a Phantom 3 Pro, I fly regularly but since updating the Go App I have been getting compass errors whilst in flight so I bring it back and land - so I am a little nervous about flying at the moment. I fly with iPhone 5s with all the latest firmware updates (including iOS 10.0.02). I have done IMU and Gimble calibrations. I go to to an open space and compass calibrate the aircraft. I have not had any crashes and I look after my equipment fastidiously. Can anybody throw any light on my problem please.