The reason I say to learn to love your phone is that I still have regret after four years of returning a 5s because of a power button rattle to start a FOUR phone return because of either yellow screens and/or visible vertical lines, and I never got a phone the same crisp white screen that I did on that first phone.
that first phone with the button rattle? PERFECT screen. Crisp whites. What made it worse is I had to stare at my wife's PERFECT screen for the next two years and feel miserable every single day.