For Assembly requires tact. The best a microfibre cloth as you get it to the glasses at the optician and a very strong piece of cardboard / plastic or a card from his wallet (have to be mounted using a debit card), but not too much pressure to spend otherwise cardboard or plastic breaks and the display along with it. As such, the manual is sufficient to be mitgeliefer with the protectors. At least if you have ever processed adhesive carrying or decorative sheet. But there is also the Internet of Mumbi a good installation video. The film holds great on the phone and is also bubble free when you have not caught a piece of the display with edge. At the beginning of the film schliert still pretty much the leaves but after some time after and do not bother me really. However, I am wondering about if I next time not again a film in matt order me because this film but reflects highly in the sun.