I have the Galaxy S7 (non-Edge) that I have used on and off since I got my Mavic 6 months ago. The DJI GO 4 app crashes on it almost every single flight, sometimes twice. The screen just goes black and then it dumps me back to the main phone menu. This doesn't affect the flight, it just scares you if you're not expecting it. You just need to restart the app, which just takes a second, and then it will continue to work fine, until the next time it crashes.
Needless to say this is a royal pain in the @ss so I switched to the IPAD
Mini 4 four months ago - which NEVER crashes / NO issues. I only use the Samsung if I don't happen to have the iPad with me, and it still crashes when I do. I'm using the latest android software and always use the latest mavic firmware.
Once you've used a larger screen, like the iPad, flying with a phone screen is a miserable experience. I highly recommend replacing your galaxy phone with the iPad Mini or iPad.