https://motherboard.vice.com/en_us/article/435n33/iphone-x-aftermarket-screen-lcd-oled

Apple’s iPhone X is notoriously hard to repair. Its screen and back are made of glass, and dropping the $1,000 iPhone will often break an unprotected device. Users who want to repair a cracked screen with Apple will have to pay upwards of $279 for the service.

Users who want to go another way and pay a third party repair store for a replacement have thus far been out of luck—aftermarket parts for the new wave of Apple devices simply didn’t exist. Worse, iOS software updates can cause problems with phones repaired with aftermarket parts.