On my brand new sparkling clean iPhone 4S, the films did not adhere so well at first. I had the edge always a part of the film, which did not stick properly. But then the service seller came into play: I got two more films without hesitation sent, the perfect fit promptly. Either I had done really too stupid or the new slides were processed simply better. By e-mail I received yet delivered a wonderful guide. That was perfect service, I did not expect. Thanks a lot for this.