Sorry if this is a dead hoarse, but I was using an old Samsung S6 Edge for a few weeks and upgraded to the Mini 4 yesterday (on sale at BB for $280). Wish I would have done it sooner. I fits well in the controller, seems bright enough, and has 128 gb of storage. So far the only thing I don't like is that you can't download maps in iOS like you can with Android (as far as I can tell).
I'm pretty sure you can. Someone posted instructions not to long ago