I will teach how to turn 30 FPS locked unity engine mobile games to 60 FPS.
This is pretty simple and easy to do.
There are two methods to force 60 FPS in-game.
The first method is Universal method.
Work on all phones. But may not work on all unity games.
1.Switch your display refresh rate to highest.
2.???
3.profit
The second method is Gaming phone method.
Should work with any phone that has the "game center" like app that can control the refresh rate.
In this case, I use Asus ROG Phone 2 which has armoury crate. so I will call it Armoury crate from now on.
This method work on ALL unity games.
1.Switch your display refresh rate to 60hz
2.Change your game refresh rate through Armoury crate to 120hz.
3.Start the game.
4.Go back to home screen or use recent app button.
5.Go back in the game again, now you should get 60 FPS.