Difficult to apply, and then did not properly

I've been looking for a while for matching sheets and then chose this film because it was reasonably priced and in my opinion, worth to try them.

Meanwhile, I have also tried to apply, the emphasis is on trying.
I can not quite decide whether she should be too big or too small for the Nokia Lumia 800.

First, it acts too small, since the display at all sides is larger than it covers the film.

Then you think, maybe it is too big, as they at the last 2mm not seem to adhere to at all outer edges and thus poses an unsightly elongated bubble that is to press either with a cloth or with a card.

By strange format of the film, it is also difficult to apply them to the display, because you have no edges to create them.

On the whole, I am disappointed. I had several of these films, all glued ugly on the screen in the same way. To protect the last remains now first on the phone, but quickly substitute must be found !!