What does an unknown display part mean
What does an unknown display part mean
Question marked as
You will see an Unknown Part 
message if the display installation is incomplete or if the display:
- Was replaced with a nongenuine display
- Was already used or installed in another iPhone
- Isn't functioning as expected
You might see an additional message that says, "Apple has updated the device information for this iPhone." This means that Apple has updated the device information maintained for this iPhone for service needs, safety analysis, and to improve future products.
These messages don't affect your ability to use your iPhone.
Learn more about iPhone parts and service history.
You will see that notification on your Lock screen for the first 4 days that you use your device and in the Settings app for 15 days. After that period, you can find the notification by going to Settings ➡️General ➡️ About
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