Question: can iphone x play 4k?
Answer: Technically iPhone X can play Ultra HD videos but not at the native resolution. iPhone X has a stunning Super Retina HD display, with a resolution of 2436 x 1125 pixels. This is the sharpest screen, Apple has ever put inside a smartphone. Whereas, 4K is 4096 x 2160 and Ultra HD is 3840 x 2160.