Should I use 1 film or 2 films on my mobile phone?

The steps are as follows: Clean the screen - tear off the inner film - apply the film and scrape out the air with a card - tear off the outer film.

Steps to apply the film:

1. Open the screen package. There will be a rectangular piece of wiping paper inside, which is used to wipe the screen.

2. Then spray cleaning fluid on the phone screen and wipe it dry with a rectangular wipe. This concludes screen cleaning.

3. A complete mobile phone film has three layers. Tear off some of the red layer, and then apply the film to the phone.

4. First apply a part of the film, and then use a card to scrape it vertically along the screen. Make sure there aren't too many air bubbles in the first half.

5. Then slowly attach the lower part. Use a small card to smooth the edge.

6. Finally tear off the blue layer. That’s it!