Just want to add my experience with two devices. I first tried my Samsung Galaxy S6 Edge Plus phone and it works perfectly. It has a very bright screen in torch mode and no lag whatsoever. I then found a good deal on a Samsung Galaxy Tab A 7.0 ($50!). It's a pretty thick tablet, so it was a tight fit in the Mavic controller, but once in there it was, in my opinion, the perfect size. The problem with the Tab A came when flying. It looked completely washed out in bright sunlight even though it has an "outdoor mode" brightness setting and it had some pretty bad lag issues, even though I had nothing on the tablet other than the DJI Go 4.0 app. I'm returning the Tab A and thinking about springing for the Tab S2 8.0. I already have a Tab S2 9.7, but I don't want to buy an adapter for the controller and I think 9.7 will be too big.