Chosen Solution

Is it possible to buy a OLED screen for my iPhone 7 plus and replace my LCD with it?

Hi, while that would be amazing, I don’t think you’d be able to, because there aren’t any OLED screens available for the iPhone 7 Plus. Technologically, however, it should be possible ( the first third party screens for the iPhone X were actually LCDs ). You would have to be a screen manufacturer to do it though