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11- 28
Mobile Common Sense
Mobile phone transmits sound through wireless signal, which is magnetic. At the same time, both sound and microphone cover electromagnetic principle. Therefore, mobile phone should not be exposed to dusty places frequently, so as not to inhale too much dust from the sound holes of mobile phone speakers, resulting in smaller or even inaudible sound of mobile phone listeners.
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07- 30
Classification of mobile phone accessories
Protective film: it can be used for the beauty of mobile phone, so that the screen of mobile phone can be free from scratches and oil pollution, waterproof and dustproof, and can reduce the eye fatigue of the owner when using mobile phone;
