I have less than one month old Phantom 4 and yesterday I was flying it second time. Before the flight I did compass calibration without any issues. Then I waited for GPS lock for a while but it get it. I restarted my phantom and it got the GPS lock and said ready to fly. I was flying in P mode all the time. And there was no wind. Here is the link to the video: Dropbox - phantom_fly_away.mp4 First everything seemed to be fine, but then where video starts while flying backwards it started drifting to the right. I stopped and had the control again. Then on 1:30 while doing slow yaw my Phantom started to fly on its own. It was totally out of control and was flying in a steep angle. After a while I got the control back somewhere in 2:25. I flew awhile and then the same thing happened again after yaw at 5:05. Again totally out of control doing some weird stuff. Got the control back around 6:10. Before that I tried RTH without anything happening. After that I was able to land safely. Luckily I was flying so high and my Phantom did not crush, but this was really scary. Never had anything like this with my Phantom 2. Any idea what can cause this behavior and should go to my retailer and try to get a new unit. Thank you for your help.