Film shimmers in rainbow colors in light & Leomustern

I've been using since the first iPhone slides, even if only for a short time because the film me then on the display but disturbs - glass happens to be better.
The film is also, equally difficult / easy to apply like everyone else and fit in my opinion very good.

The film is the front as well as rear shiny.

KO criterion:

The film, particularly the display film, shimmers in the light at the side look over the entire surface of the film in rainbow colors and Leomustern. It also falls heavily on when the iPhone 5 is on the table and the screen is black.

A friend has it on his iPhone 5, according to his statement, a Mumbi film. This shimmers through the skin at all.
In addition, his film is matt for back-middle and the small upper and lower parts are shiny. Seems much more logical in Nachhinen since the middle back of the iPhone 5 is also dull and I was surprised at my film, why the iPhone 5 with the film suddenly looks so funny behind.
Have let me give you a set of Him and these atFoliX FX-Clear films go back. For that they are also more expensive, the quality is really bad. Had I the right time Mumbi films to buy, I was only a little restrained, what Mumbi concerned.