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Why is it still a black screen after hanging up the phone, sometimes leaving the body or keeping a black screen?

Why is it still a black screen after hanging up the phone, sometimes leaving the body or keeping a black screen?

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Because the infrared sensor has high precision and high sensitivity, if any infrared sensor hole is obstructed, it may affect the infrared sensing function of the mobile phone. For example, sticking non-original mobile phone film, if the hole is blocked, it will cause functional errors. We suggest you replace the original film.