As long as the phone is pulled out, the screen will go black, and it is still far away from the micr

1. Confirm the call method used.

If you use headset calls, hands-free calls, and Bluetooth calls, these status infrared functions will not take effect, and the screen will not turn off (turn on) when the screen is close (away) to the ear, and you can switch to the handset call mode test.

2. Check whether there is an obstruction at the window position of the infrared sensor.

If there is oil stains, or if you use opaque film (non-original film) or non-original protective case, it may block the infrared sensor and cause the function to fail. It is recommended that you remove the oil, remove the protective case or opaque film, and use the official standard protective case.

Infrared sensor window location View method: Go to Settings - System Management - Customer Service - User Manual - Mobile Phone Overview and Quick Start - Introduction to Mobile Phone Appearance - Light Sensitive & Infrared.

3. Confirm whether to use third-party dialing software.

It is recommended that you uninstall this type of software and use the built-in dial-up function of the system to observe.

4. Confirm whether the system is the latest version.

The new version improves compatibility and stability, go to Settings - System Upgrade, it is recommended to observe after upgrading the system.

5. Service center testing.

If the above methods fail to solve your problem, please back up your mobile phone data in advance, bring your mobile phone and purchase voucher to vivo customer service center for testing, pay attention to WeChat *** "vivo" or "vivo customer service" to inquire about the service center address**, it is recommended to contact before going to ensure that there is a staff reception before going over, so as to avoid delaying precious time and running in vain.

Hello, since I don't know what model of your phone is, it is recommended to try it according to the following methods:

1.Check that the distance sensor at the top of the screen is not blocked, dusty, or foreign objects.

2.Check whether third-party software is installed on your phone (such as management software such as Phone Manager) and delete such software.

If the machine supports the proximity sensor function, it is normal for the screen to turn off if the proximity sensor at the top of the screen is blocked during a call, if it is placed next to the ear.

This should be set.

1.The black screen of the mobile phone is one of the faults that are often encountered in the maintenance of mobile phones, and the black screen can be divided into two types: one is the black screen in use, and the other is the black screen in standby. Here are some basic causes and solutions that cause black screens.

2.Most of the black screens in use are placed by yourself.

This is rarely the case caused by third-party software that comes with the machine. It can also be subdivided into two kinds: one is that the software itself has a problem, the software itself is unstable, or it does not match the mobile phone system, etc., this is very easy to solve, and it can be unloaded; The second is the conflict between software and software, which is a little more troublesome to solve, and requires a software installation and uninstallation experiment.

The next question is with that software. If you find it, uninstall it, and the problem will basically be solved.

3.Black screen in standby, let's talk about the standby principle first, straight board machine because most of them have a power-saving circuit design: the mobile phone can not detect the key trigger signal for a long time, it will automatically turn off the screen, that is, standby, when you need to use the mobile phone, a button will activate the power-saving circuit, and then the screen lights up.

4.The reason for the black screen is often reflected by the delay in the triggering circuit of the screen. That is to say, the mobile phone system has issued a command to light up the screen, but because the circuit is delayed, the screen is not successfully lit, but the mobile phone system thinks it has been lit, so it causes a black screen.

First, the phone turns back on.

When you hit **, why does the phone screen go black when it is close to your ear?

This is because there is a "distance sensor" hidden near the earpiece of the mobile phone, this is a hardware device, when the user is talking to someone, this distance sensor will collect the distance between the mobile phone and the user's ear, and then the operating system of the mobile phone will judge this distance, if the distance between the mobile phone and its ear exceeds a certain threshold, the screen will be black, otherwise, the screen will be on, it's that simple.

1. Reason: The light sensor of the Apple mobile phone is a little on the left side of the earpiece, and sometimes the front camera will go black when it is covered, which triggers the light sensor.

Second, there is a black hole on the earpiece is the sensor, when you answer, the mobile phone will touch the face, blocking the sensor screen will be black, this is to prevent the operation of the wrong touch in the project. If it is in the process of making **, in the case of using the handset to answer, this situation is normal.

If you put your hand on the front camera of the phone, the phone will go black because there are proximity sensors and light sensors near the front camera of the phone. 1. When the mobile phone is played, when the face is attached, the distance sensor and the light sensor are inducted, so that the mobile phone screen is black; 2. When the phone sets the automatic brightness, make the phone's light sensor react to make the phone's brightness change and darken, resulting in the "black screen" you see

This is also a function of anti-mistouch,All mobile phones have oh pro,Now,Can't be turned off for the time being,See if the system upgrade can be optimized in the future,Pro。

Hello: According to your description, in this case, it is not possible to actually detect the physical machine in the network. In order to understand and solve the problems of your mobile phone, it is recommended that you send your mobile phone to the nearest Samsung service center for testing, and the service center will determine the specific problem of the mobile phone and the cost of accessories and repairs according to the test results.

It can be big or small, the microphone cable is conservatively estimated at two hundred, and the low screen is five or six hundred.

It is estimated to be poor contact. If so, it won't cost much.

I can't say for sure, but we have to detect what the fault is.