[l4yao]

On iPhone 12 and moreso on 13, many genuine OEM parts cannot be swapped by anyone other than those authorized by Apple.

[xondono]

AFAIK, that’s only the case for the screen, and there’s a warning when swapping the rear camera.

[philliphaydon]

https://youtu.be/8s7NmMl_-yg

It’s not just a warning. Functionality is flat out disabled. Swapping parts between 2 iPhone 13s boinks them.

[l4yao]

(Some) Functionality is also lost on the front camera, faceid sensor and battery.