The application of the film has given me no trouble.
I am the guide (almost literally) followed and had taken a microfiber cloth handkerchief used (although it is not recommended).
The handkerchief I had also previously moistened with a drop of water and thus cleaned the display.
Mind you I have done all in our flat (!) -kitchen And not as suggested in the bathroom. However, we have in the kitchen a neon tube on the countertop, which greatly simplifies the detection of dust and fingerprints on the surface.
Then applied the film as described and ready.
No air pockets.
I did not even use my lying ready debit card. The film lay almost "as if by magic" to the mobile phone.
Even the fit is right to end 100% without falling into endless fumbling.
I have only just now noticed a (most likely caused by me) scratches on the film, but it does not bother at all. (And better in the film than in the display;))
Be honest: How many people keep their mobile laboratory closure?
In everyday use, the film is completely invisible and wonderful =)
Conclusion: + No problems during installation
+ Good protection for display
+ Product as described
Buy recommendation!