If your screen has lines down it or is all black you’ll need full Oled repair

 

There are some options when coming to this.

 

You have soft Oled or hard Oled, the soft is more flexible and will be more durable but is more expensive, the hard is less durable and may break easier.

 

You can also get LCD but it’s not recommended and is normally used by the cheaper repair places, you’ll probably be unaware of this when they quote that cheap price. This only applies to the X,XS and XS max