You are at a distinct disadvantage playing on any Android device.Beyond that just buy the most expensive, new phone on the market and when you email kabam about all the bugs you will still receive a copy and paste reply stating that your device is too old to be compatible with contest of champions.This game was designed for iOS plain and simple.
Currently the Galaxy S10 plays the game as well as the iPhone XS Max and iPhone 8 plus. In the future that might change and I can't speak to other devices as I only tested those 3 phones side by side.