The film was easy to apply and has immediately sat perfectly on my iPhone 4.
However, I noticed after a short time that the Fotgrafieren with this feature is only possible if you remove the foil member between camera and flash hole. If this is in fact on it, the flash is carried through the film to the camera and there are white streaks in the lower left of the screen.
Tortzdem this film is really great, because it is dull and the Sliden altogether represents a feel-good factor to it.