About The Non-Genuine Parts

After replacing the screen with a non-genuine part or oem part you will see a pop-up alert as below picture for the first four days and it will disappear after four days. 

Display Messages alert don't affect your ability to use your iPhone.

About The OEM And Genuine Parts

iPhone displays have been designed, tested, and manufactured for Apple's quality and performance standards. This includes great color accuracy, white balance, and performance for features like True Tone, Night Shift, and Haptic Touch