Grade A - no scratches and excellent condition. Grade AB - Barely noticeable scratches under the light.
Grade B - some noticeable scratches or deep scratches.
Grade C multiple noticeable or deep scratches
You would get a screen similar condition (grade) to the one in picture (Photo shows only an example).
Note:
Screen Display message would appear on your phone even if the screen is original, If you want to get rid of the message, you can try microsoldering. It's all about the touch module. Transplant the chip onto the replacement screen and the problem is fixed.
If you don’t do that you will get this message even if the screen is original
Each phone is programmed to its own chip, so if you don’t transplant the chip you will get this message
