I am on Android OS - solidly updating as they come out but have had major issues with disconnections in both 500 / 550 updates. When 600 came out I was hoping it would improve but NOT! So I bit the bullet & downgraded to 400 - it is soooooo much better for me - absolutely NO disconnects & believe it or not I still have AFC (not that I use it ) AND have sound in locally cached vids that I didn't have before downgrading to 400.......what's up with that?
Oh yes & I also had problems with the gimbal when I switched it over ( in flight ) to Portrait mode - I could never get it to go back into landscape mode again........400 takes care of that problem too!!!
I had read that DJI only facilitated going back one step in downgrading but I used' DJI Assist' & did both the Mavic & controller without problems straight back to my beloved (and safe) 400.
Gonna stick with .400 until I see GLOWINGLY positive reviews from whatever update comes out next!
Will be testing everything all over again this week to make sure I'm good to go with no disconnects or video transmission problems at long distance etc.
Oh yeah guys if you do decide to downgrade - remember to check & reset ALL your settings again.
Cheers - safe flying!