My phone gets very well looked after, I can't do with case or screen protectors and I never put in pockets with keys, I never put it face down, mine is the basic s21 so the back never gets scratched even with look after it very well it still has a couple or micro scratches nothing too silly and to be honest to find them you have to look at them at the right angle under a lamp or the sun, doesn't really bother me, it used to in the past and I have tried everything once they there they there, its something I have to live with if I don't want a screen protector. I believe absolutely nothing gets rid of them once they there