Excellent - Otherwise known as 'Grade A’, phones graded as 'Excellent' are in like-new condition. Typically, these are phones that have been returned by customers within their cooling off period, so have had minimal, if any, use.
Very Good - Otherwise known as 'Grade B', phones graded as 'Very Good' are in great condition. Typically, these are phones with minor cosmetic imperfections and very light signs of use.
Good - Otherwise known as 'Grade C', phones graded as 'Good' are in fair condition. Typically, these are phones with some cosmetic imperfections and signs of use.