iPhone XR phones

Two used iPhone XR phones in good and clean condition. For the yellow one, the screen has been replaced, but it seems it's not properly fixed because the phone works sometimes and then turns off; I don't know what the problem is. The phone has a new SIM card, comes with a protective case, but the screen protector has been removed. The second one is red, clean and flawless, in good condition with a battery health of 77%.