Need to remove this unknown part msg from this iPhone

Hello ~ This is from the article you came from…

About genuine iPhone displays*

*An Unknown Part  message will appear 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

An additional message might appear 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.

Have you had your display repaired? If so by whom?

~Katana-San~