A:Answer The Apple product ratings are as follows.
Grade A
Like new or "near mint" condition. The screen may or may not have been replaced. If there is any damage, it is minor and confined to signs of every-day wear.
Grade B
Used or "good" condition. The screen has been replaced. There may be some light cosmetic damage on the case, such as scratches and scuff marks.
Grade C
Heavily used or "fair" condition. The screen has been replaced. There are signs of heavy wear on the case. No one will mistake it for a new iPhone.