I have the envelope has been going for about 5 months, and there is nothing wrong with her. It adapts well to the phone, at the beginning it was a bit hard on it and sat very firmly; to play around with it more often, pulls it off, etc, so it looks as if it would wear out a bit. So best to just leave it. In addition, the circles on the envelope in the rubberized back of the phone to impress, but which can be determined only by very close examination appear; the rings would probably go away quickly, Taking away the shell from a long time. The design can indeed any self-assess and see ... I personally like very well, so I am completely satisfied with the product.