Mobile Game: Why The Resolution is so bad?

I was trying to make an .apk for my game just to see how it looks like without using the Unity Remote. But when I installed the apk the resolution is very bad, I’ve tried everything, but nothing works. Anyone have any idea of what’s happened?

Solved, I create a new project and i have copied all the setting, I don’t know what of this chage the game so drastically, but now it works.