Hi, 
Suggestion i would like to make is the scale of the UI could be a little bigger on android.
Aswell as i ran into the problem a couple of times accidentally choosing a lower resolution.
Once applied and confirmed, there's no way of getting it back to default without deleting and reinstalling the game.
You cannot scroll the resolution list, it just shows the 3 lowest resolutions and when you try to scroll it just picks one of them, so you can't scroll to the biggest (default one), to reset it.
This is something that i think is a little bit frustrating if you accidentally misclicked. and maybe you could fix it.

Thanks in advance

suggested a couple times already, still +1 from me, my phone has a camera overlayed, so i can't open backpack, pokedex, or pvp unless i flip my phone 180