If the app crashes, close its and restart. You may need to shut down your tablet and then restart. If you have Litchi you can start that up and see if it connects.Yeh thats what this thread is about. I know how to fly in ATTI mode. But it wont help if you cannot see the drone with your eyes and your DJI go app has crashed( no video link).. as you cannot tell which way your facing. youre kind of screwed.