At the "improper application" on my part, it may also not be located because the air hoses are indeed all around visible and also not be "express". Only the film for the back served their usefulness, therefore two star.
As some may speak of a good film here is beyond me, maybe different kinds of screen protector film will be sent here? At least can be found in my film no hole for the Notification LED, as mentioned in part here.
#Nachtrag
I had not yet received from HandyNow a replacement with films, among others were in that delivery and 6 sheets for the front case (the other items here on Amazon). These have a slightly different interface, and are slightly smaller. The result can be seen in the figure below: [...]
Overall, significantly better than that of the "2 + 2-pack", the air hoses are almost completely gone. So the products could easily fit deserves four stars.