Do I need to remove the original film of the Guanfudun phone before applying it?

A: The original film must be removed and cannot be laminated. Reason: ① Superimposing the film application will increase the total thickness (more than 0.6mm for two films), seriously affecting the touch sensitivity and heat dissipation. ② There is an air layer between the two films, which will produce Newton rings (colored rings) and reflections, seriously affecting the display effect. ③ The adhesive layers of the two films may stick to each other, and when removed, they may damage the screen coating. ④ Superimposed film application does not enhance the protective effect (the protection of the film relies on the strength of the glass itself, not the superimposition of thickness). The correct approach: ① Before applying the film, remove the original film on the phone (including factory film, tempered film, water condensation film, etc.) first; ② Clean the screen (alcohol bag → dry cloth → dust removal sticker); ③ Paste "Guanfudun". Note: ① Some mobile phones come with a layer of plastic protective film (not tempered film) when they leave the factory. This film is very thin, has poor light transmittance and is not scratch-resistant. It must be removed before applying the tempered film. ② If the original film is broken or stuck very tightly, use transparent tape to stick one corner and slowly lift it up. Do not use a blade to pry it (it may scratch the screen). After removing the old film, there may be residual glue on the screen. Gently wipe it clean with an alcohol cotton pad and then stick on a new film.