There is static electricity in the mobile phone. What happened? !

Cha! That's not a static sound, it's the sound from the speaker. If the sound is very low, it is on the receiver speaker. If it's loud, it's on the speaker. Listen to it when it makes a sound. There are usually two possibilities. One is the sound when the speaker gets the power signal but not the audio decoding signal. Usually the problem comes from leakage or short circuit, so if your battery is used normally and every drop of water is wet, then another possibility is that it is interfered by electromagnetic waves, which is very likely and common. Usually, the transmission power is too high. If you put your mobile phone near the computer speaker, of course, when the computer is turned on and the speaker is turned on, as long as you are a G-network mobile phone, you will find that the computer speaker will squeak when answering the phone, which is basically the same as yours. That's radiation interference, which is caused by the high efficiency of the chip power amplifier in the transmitting part of the mobile phone. That is to say, your mobile phone signal is stronger than ordinary mobile phones, and the speaker interference is stronger. Of course, when the mobile phone is turned on, the information of the SIM card will naturally be sent to the mobile base station for registration. When it is emitted, it will naturally interfere with the speaker. Please listen carefully when you make a phone call and see if there is any interference from the bell speaker at the back. This must be your problem, usually it's the big fake mobile phone. You can ignore it, and it won't have any impact on your mobile phone, unless you occasionally answer the phone and turn it off when the battery is low. It is difficult for ordinary maintenance personnel to solve this problem, so don't pay attention to him. As for the change of time after taking the battery, that is the most common problem of mobile phones. After a long time, the mobile phone reed has a button cell, the scientific name is 32.768KHZ real-time clock crystal backup battery, that is, after you take the battery, it supplies power to the clock crystal to ensure that the time will not change. If it is aging or moldy, it will fail, which will lead to the change of the charging time of the mobile phone battery. Generally, it can be directly charged several times for electrical activation. If not, you can use it. If it is repaired, change a spare battery, at least in 20 yuan. What you said about asking questions proved nothing at all. Maybe the mobile phone and battery are not produced at the same time, but are assembled in two workshops at the end of production, and the call time may start to be counted at the counter or even when the manufacturer tries the machine.