1) Clean the screen by wiping it in a dust-free, tidy indoor environment without wind to minimize the impact of dust on the film. This thorough cleaning before applying the film is essential, as everyone knows. Accidental dust contamination can directly affect the film's outcome, ranging from bubbles after application to complete failure.

2) After cleaning with a cloth, if there are stubborn stains on the screen, it is crucial not to use a damp cloth to clean them. Simply place a BG dusting sticker over the dust, peel it off, and use the sticker's adhesive to remove the dust.

3) Remove the protective film from the packaging, do not tear the release film yet, and place it directly onto the phone screen. Get an initial impression of the film placement, particularly observing the fit of the edges with the phone screen. This will give you a general understanding of the film's position, which will aid in the subsequent application process.

4) Peel off a portion of the release film marked with "①," being careful not to touch the adhesive layer of the protective film with your fingers. Each protective film product is divided into three layers, with both "①" and "②" being release films, which serve to protect the intermediate protective film.