I've only had the Mavic for a month or so and up to few days ago, my OnePlus 3 Android 7.1.1 was working fine (few app crash but easy to just restart the app). All of a sudden, the GO4 app totally looses connection to video feed and all other flight data within a few sec. of connecting to the Mavic. My son has a OnePlus 3 phone too so we testes the GO4 app on his phone as well - same problem.
So I've took the same decision; I ordered a iPad
mini 4 128G + cell even I'm a hard-core iProduct hater too. I really can't be bored to wait until such date were DJI will make a stable Android app to fly my $2000 drone (yep, that's the price for the combo version in Denmark).