Soon after the was released, an iFixit teardown showed that if the display was replaced by a third-party repair shop, unless they transferred a microcontroller from the original screen. Apple will soon mitigate the issue with an upcoming software update, so Face ID will still function even without swapping the chip to the new display.
Moving the microcontroller from the device's original screen to a replacement is no easy feat — iFixit noted . That may have put independent repair shops outside of in a tough spot, since it takes more time and special equipment to replace a screen and swap in the microcontroller.
It's not clear when Apple will roll out the software update to remedy the problem, though questions remain over why the Face ID function broke in the first place if the microcontroller wasn't moved over. The controversy emerged amid a broader push to right-to-repair rules.