Many hassle to install this film; a lost protection on both. Instructions house: 1-Have a basin of water to eliminate dust in the air (10min wait before starting, be in a confined and well lit place). 2-Clean with the cloth (the longest stage: clean surface = no bubbles). 3 Remove the plastic film-1 (the evil tongue pulls the film surface "sticky" not to touch). 4 Place the film-from the top where there is the webcam and the brightness sensor (the 2 holes indicate if the film is positioned). 5 Drop As in the downward film. 6-edges have bubbles are normal use the squeegee to remove bubbles. 7-Check for bubbles. 8-Remove the plastic film 2. Me no bubble.