Apple will no longer break Face ID on repaired iPhone 13s

The "Unable to activate Face ID" message that appears after swapping displays.

Enlarge / The “Unable to activate Face ID” message that appears after swapping displays. (credit: iFixit)

Apple says it will back off its plan to break Face ID on independently repaired iPhones. The company’s often contentious relationship with the repair community was tested again when “unauthorized” iPhone 13 screen replacements started resulting in broken Face ID systems. A new report from The Verge says that Apple “will release a software update that doesn’t require you to transfer the microcontroller to keep Face ID working after a screen swap.”

Screen replacements are the most common smartphone repairs. Apple included a new microcontroller in the iPhone 13’s display that pairs each screen with other components in the phone. As iFixit reported, if a third-party repair shop replaced the iPhone 13 display, Apple would disable the phone’s Face ID system.

The repair community has started calling this part-dependency trend “serialization.” Basically, each protected component reports a serial number to the OS, and the software keeps track of which serial numbers the device is supposed to have. If you swap out a part, one of the serial numbers will change, and the OS will know about it. In the case of third-party iPhone 13 screen replacements, the phone would say, “Unable to activate Face ID on this iPhone.”

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