Lock the screen during a conversation on Android. Calibrating the proximity sensor on xiaomi redmi, note, mi devices

The proximity sensor is responsible for dimming the iPhone screen during a call. It triggers when something covers it. During a conversation, this “something” is the person’s head, to which the iPhone is brought. Thus, if the iPhone screen does not go dark during a call, the proximity sensor is to blame. How to figure out why the screen does not go off during a call on an iPhone is described in this guide.

Place a piece of tape on the proximity sensor

Most often, problems with the proximity sensor occur after replacing the screen on the iPhone. The sensor is brought to its senses by one method that has been proven many times. You need to stick a small piece of transparent tape on the sensor, and then paint over the tape with a black marker.

Service center technicians also note that instead of tape, it is more effective to use a piece of rubber band about 5 mm long. It needs to be stuck between the light and proximity sensors, after which the problem with the iPhone screen being turned on during a call will disappear.

Of course, to gain access to the sensor, the iPhone will have to be disassembled. You can do this yourself. The instructions below show in detail the analysis of various iPhone models.

If the screen on Android does not turn on after a conversation, or it does not go off when making a call when the gadget is brought to the ear, then you need to look for reasons in the operation of the proximity sensor. When the sensor breaks, the phone cannot correctly determine its position in space, which is why the screen does not light up, but the device works.

This article is suitable for phones and tablets of all Android device manufacturers: Samsung, LG, Sony, Huawei, Xiaomi, HTC, ZTE, Fly, Alcatel and others. We are not responsible for your actions.

The main function of the proximity sensor is to automatically turn the backlight on and off during a conversation. This significantly saves battery power and prevents your cheek or ear from accidentally pressing the touch screen of your device.

When an Android gadget does not go off during a call, the error should be looked for in the operation of the sensor. The following reasons are identified:

• Mechanical impact, damage to the cable or other components.
• Moisture ingress.
• Problems with the firmware.
• Lack of RAM.
• Poor visibility (covered/covered with a cover or protective film).

Before using software troubleshooting methods, you need to wipe the screen. Here, special care should be taken to remove the top part where the proximity sensor is located. If there is glued glass or film on the display, over time they can lose transparency, which will interfere with the sensor.

Increase

You also need to check your call settings. There is a possibility that their parameters are set incorrectly, and the sensor is simply turned off. This option is not available on all smartphones, but it is still necessary to check.

• Open the settings, go to the “Options” or “My Devices” menu.
• In the “Calls” section, you need to make sure that the checkbox next to the “Proximity sensor” line is checked.

Increase

The user must ensure that there is enough RAM installed in the system for the sensor to function properly. To do this, open the list of applications in the settings and in the “Running” section we check how much RAM the gadget uses. If a shortage is detected, we shut down unnecessary applications.

Android screen goes blank during a call

There are problems with the proximity sensor in Android devices when the screen immediately goes black during a call. It happens that the screen goes blank and does not turn on when an outgoing call is made or when a call is answered.

The contactless sensor has several functions, the most important being automatic backlighting and dimming of the display during a voice call. This is done by detecting that the smartphone is positioned close to the user's face.

When the gadget approaches your ear, the sensor detects this and turns off the screen to prevent accidental disconnection of the conversation and to save battery power. When the user removes the device from the ear, the screen lights up, after which you can mute the call or use other functions (switch the conversation to the speaker, turn on the numeric keypad, etc.).

First, you need to remove the tempered glass or film from your smartphone. In some gadget designs, they cover the sensor, causing an erroneous detection distance. Quite often, the reason lies precisely in the glass - in stores there are many low-quality, cheap products that are not reliable.

If you tear off the tempered glass, the normal functioning of the sensor can be restored. This method may seem ridiculous to some, but just look at how many complaints there are on the Internet about problems with this sensor that arise after gluing such glass.

In some cases, the problem can be resolved by updating the software. For example, some applications promote sensor deregulation. In this situation, you can use a free application that will calibrate the sensor in several steps. This function can be performed by the Proximity Sensor Reset utility.

Working with this application is not difficult. The settings wizard will guide you through the entire process, and at the end you need to confirm the new calibration, after which the gadget will reboot. Then you should check whether the calibration was effective and whether the phone screen now turns off during a call.

If the warranty period of your gadget has already passed, other solutions have not yielded results, and the sensor itself is physically damaged, then you can disable the screen turning off during a call. The screen won't stay on all the time when you're on a call, and you'll be able to use on-screen buttons to eject the keyboard or activate speakerphone.

The downside of this solution is the constant conversation with the illuminated screen, which is why you can accidentally press the buttons. To disable the proximity sensor, you need to download a special Xposed Framework module. This process can only be performed if you are rooted, which provides administrative privileges.

Some owners of Android devices are helped by cleaning the speaker grill if there is a motion sensor there. To do this, take a small brush and carefully clean everything.

There are a lot of questions on the Internet about the Sony Z3 Compact phone; it is on this phone that the screen very often goes blank during calls. Many users manage to solve this problem by pressing on the upper right corner (the sensor is located there).

There are cases when on the Xperia Z3, when you press hard on the top of the screen, you hear a click inside. After this the problem disappears.

Some gadgets have an intelligent processing option in the call settings. If you find it, you can try disabling the option. In Sony phones, the screen often peels off from the body, which is why a similar problem arises. This can be solved by careful gluing.

In the settings you can disable the incall ui application. If the process does not help, you can try turning on notifications for this software in the settings.

Android screen problems after sleep mode

Another problem that may arise with the screen is that it does not start after sleep mode. There may be a black or white screen, but the smartphone itself continues to function. If you have a similar problem, you need to know that the reasons may be hardware or software:

• Moisture getting inside the housing.
• Mechanical impact.
• The power button is not working properly.
• Problems with the firmware.
• Lack of RAM.

If the smartphone does not turn on, but vibrates when there is an incoming call or performs other actions, then there is a possibility that the problem can be solved without visiting a service center. It is necessary to clear the RAM of unnecessary processes by shutting down unnecessary applications. If this does not have an effect, make a backup of important information and reset the system settings to the factory state.

Phones evolve from year to year, becoming more and more complex devices, having a dozen different sensors on board. Each of them is responsible for certain functions. For example, a proximity sensor is responsible for regulating the auto-brightness of the screen and turning it off during a conversation; it is also called a light or ambient light sensor. Calibrating the proximity sensor on xiaomi redmi or note devices will help correct incorrect operation of the sensor, which can cause a lot of problems for the smartphone owner, for example, accidental taps on the screen during a call. There may be several reasons for malfunction. If a banal reboot of the device does not help you, then let's look at the reasons according to their degree of complexity.

Turn on the light sensor

Your sensor may simply be turned off. To enable it you need to take several steps, let’s look at the example of xiaomi redmi 3s.
Open the “phone” application (dialer in common parlance)
Long press on menu
In the list that opens, select “incoming calls”
Then we find “proximity sensor” in the list and turn it on if it is disabled

Some xiaomi models may not have this option or this function will have a different location in the menu. Unfortunately, it is impossible to give a universal menu path due to the wide variety of models and firmware.

Disabling “harmful” functions

The most common reason for a sensor not working correctly is the enabled “pocket lock” function, the purpose of which is to prevent the screen from turning on when the smartphone is in your pocket. Because of this option, the light sensor often does not work correctly.

This problem is relevant on all xiaomi firmwares, for some reason engineers do not want to fix this problem or believe that everything works as it should, however, for some users, this function does not cause problems. To turn off pocket lock, you need to go to settings, then to “calls” and then to “incoming calls”, there you can find a slider that turns off this feature.

What can interfere with the sensor?

One of the reasons for a proximity sensor not working correctly is physical interference in its operation, namely protective film or glass. For example, our employee’s xiaomi redmi note 3 pro does not have this proximity sensor working for this exact reason. If you do not have holes for the light sensor, then you need to either change the film/glass or make this hole yourself. This sensor is usually located above the screen, next to the front camera and earpiece. Low-quality or universal films usually suffer from this problem. Therefore, before purchasing a protective coating, be sure to check the presence of all holes.

Testing and calibrating the light sensor

Checking the light sensor

A fairly popular solution is to calibrate the proximity sensor of xiaomi devices. First, you need to check the functionality of the sensor in your phone, to do this, dial the following numbers *#*#6484#*#* (you do not need to press the call button), thanks to this combination you will be taken to the engineering menu, tested on xiaomi mi4 and xiaomi redmi 3 pro , other ways to get there are described in our article about the engineering menu.
You will see 5 buttons on a black background.

Click on the top right, it should say “Single Item Test”.

In the list of components you need to find and select “Proximity Sensor”; it is usually located almost at the very bottom.

In the test itself, the inscription “far” or “close” will be displayed on the screen; closing and opening the light sensor (for example, with your finger), the inscription should change. If this does not happen, then this module is faulty.
After this text, you can try calibration.

Light Sensor Calibration

Let's look at calibration using the xiaomi redmi 3s smartphone as an example.

Turn off your smartphone completely.

Press and hold the volume+ button (volume up), and without releasing it, press the power button. Your device should vibrate, after which the buttons can be released.

A menu will open in front of you, in 95% of cases it will be in Chinese (including on xiaomi redmi 3s). You need to click on the “中文” button, it is located on the bottom line to the right of the “download模式” button. After this, the menu language will change to English.

Click on the “PCBA test” button on the top line and the engineering menu opens in front of us.

If the touchscreen does not work, then use the “UP” and “DOWN” buttons to move to the “Proximity sensor” item and go into it.

You need to place the phone horizontally on a flat surface.

The light sensor should not be covered with anything (it is better to wipe it with a cloth).

Make sure your phone is not exposed to bright light.

Click on the “Calibration” button, the sensor will begin to calibrate.

Afterwards the message “Successfully” should appear, it means that the calibration was successfully completed.

Now you need to check the operation of this module, cover the light sensor with an opaque object, on the screen 1 should change to 0 and vice versa.

After this, you may need to press the “Pass” button, you will be taken back to the engineering menu, there we press “Finish”, then “Power Off”, the phone should turn off.

Turn on the phone and check the operation of the sensor. When you make a call, the screen should only go dark when you bring the phone to your ear.
In our personal experience, the correct operation of the xiaomi redmi 3 proximity sensor was completely restored using this method.

Incorrect device firmware

If calibration does not help, then the reason for the incorrect operation of the smartphone may be incorrect flashing; this applies not only to the light sensor. The problem is that the new firmware does not install correctly on the smartphone, receiving the remaining garbage from the old firmware. This problem concerns the update method through standard recovery (bootloader). The transition to new versions should be done via fastboot or with resetting all settings and user data (full wipe). Among the disadvantages of this method, it is worth noting that all your data and applications will be deleted, but all garbage will be deleted along with them.

Other reasons

If the previous methods did not have the desired effect, then replacing the screen with a low-quality one may be the reason. Unfortunately, screen modules for xiaomi phones come with a light sensor. If you have already had your screen replaced at a service center, then it is quite possible that, contrary to all the technician’s beliefs, you were simply given a low-quality screen with a bad sensor. If your smartphone does not work correctly from the very beginning of the purchase, then the reason may be a simple defect. We advise you to contact the seller for further instructions.

We hope these tips helped you, be sure to write in the comments whether this article helped you and what advice helped you.

Warm categorical greetings to everyone! Constantly active screen backlight can become quite a big problem - because the fact that the display does not go out automatically leads to all sorts of inconvenient things. Which ones? But for example: very fast battery consumption, strong heating of the device, and in general it’s terribly annoying, since it’s almost impossible to use the iPhone in this state!

No, of course, there is one win-win option - put your smartphone on charge and never unplug it from the outlet. How do you like this? I don't like. It’s much better to deal with the always-on iPhone display once and for all. This is exactly what we will do today. Are you ready? Reade set Go. Let's go! :)

What situations can cause the iPhone screen backlight to be constantly active:

But you never know what else could happen! Let's take a better look at all the ways to solve the problem of the iPhone screen not going off. So, here are the actions that are universal and suitable for every case:

• Hard reboot. To do this, press and hold two buttons - Home + Power (for iPhone 7 and older - volume down and power button) until a complete reboot.
• Software via DFU, after this it is important not to restore the backup and observe the behavior.

Now let's move on to special cases. There can be two of them:

1. The display does not go off during a call.
2. Does not automatically lock or turn off the screen after receiving a notification or in standby mode.

iPhone screen doesn't turn off during a call? Solution!

First of all, look carefully at the front of the gadget. Do you see films, glass, cases on it - covering the front side of the iPhone? Even if they seem completely transparent to you, it makes sense to get rid of them and check the operation of the light sensor without such accessories.

If this does not help, and all the previous tips (resetting settings, rebooting, restoring) were completed, then most likely the problem is with the light sensor. He could either simply “move away” or break.

That's why when you hold the phone to your face during a call, your iPhone doesn't know to turn off the screen and doesn't do it. There will be only one solution - replacing the proximity sensor. Fortunately, its cost is not high and it changes quickly. On average it will cost you 1500-3000 rubles.

iPhone display does not turn off after receiving a notification or SMS

The situation is this: a notification arrives on a locked iPhone, the display naturally lights up, but subsequently does not go out automatically, and you can only turn it off by pressing the lock button. I know from myself that it’s terribly annoying, especially at night. I received a notification when I was sleeping, I woke up and my phone was completely discharged.

I’ll say right away and make you happy - the problem, most likely, is in the software. This means there is a chance to fix everything without going to the service center. What can be done:

1. First of all, go to Settings - General - Auto-lock. If it is set to “never,” then this is precisely the reason that the screen does not lock automatically. Set the exact time interval (default is 1 minute).
2. Next, you should perform the steps indicated at the beginning of the article, namely a complete reset and restoration of the firmware. But there is a small “hiccup” here - such actions are not always convenient to perform, and it takes a long time. So you can do this...
3. Remember what games and applications you installed recently and remove them one by one and check if the situation has changed for the better. And of course, if you have a jailbreak on your device, then you should also pay attention to the tweaks that are installed, they can certainly lead to the screen not going dark.

Finally, I would like to note that you should not forget about the warranty (

On your Android, when you make a call, the screen immediately goes blank and turns black? If so, then the problem is most likely with the proximity sensor on the phone.

This problem can appear in any phone, for example, sony xperia, mi xiaomi, lumia, compact, samsung, asus, xiaomi xiaomi, but it has been noticed that most often the screen goes blank on sony z3.

Moreover, it happens that it goes out and does not turn on - this is no longer a joke. If this happens when answering a call or making an outgoing call, then most often the culprit is the proximity sensor.

What is a sensor and how does it work in Android? The proximity sensor has several functions, but the most important task is to automatically dim and illuminate the display during a voice call.

This is done by detecting what is near your face and your phone. When the phone gets close to your ear, the sensor detects your head and the screen turns off to avoid draining the battery and to prevent you from accidentally disconnecting your call.

In turn, when you remove the phone from your ear, the screen lights up so you can mute the call or use other functions (numeric keypad, switch the conversation to speaker, etc.).

When it comes to damage to the proximity sensor, the mechanism described above stops working, so there is no way for the phone to infer whether it is currently near a person.

The problem with the proximity sensor usually manifests itself in the fact that the screen immediately turns off during a call and lights up only after a call, or vice versa - the screen does not turn off even if you put it to your face during a call.

Causes of problems with a contactless sensor when the screen goes blank during a call

A problem with the sensor can occur either in software or in purely mechanical damage.

If the problem is software related, you can often fix it yourself.

For example, by recalibrating the sensor, by restoring the phone to factory settings, or by reinstalling the software.

If the problem was the result of, for example, a phone falling, then there was probably mechanical damage to the sensor.

This often also happens when there is a “film separation” from the top of the case to the bottom of the phone (particularly on Sony Xperia).

Of course, purely mechanical problems are best resolved by sending the equipment for service, because replacing the sensor is not easy.

The first solution when the phone screen goes blank when there is an incoming call is to remove the film or glass

First, remove the film or tempered glass from your phone screen. In some smartphones, due to their design, they may cover the sensor and cause an erroneous detection distance.

Very often, the cause of problems with the proximity sensor can also be glass - in stores you can find tons of very cheap, low-quality products that are not reliable.

By tearing off the tempered glass, you can restore the normal functioning of the sensor.

Of course, for some this may seem funny, but Uncle Google or Yandex will give you hundreds of records from their “warehouse”, where users complain about problems with the proximity sensor after gluing poor quality glass.

Solution two if the phone screen goes blank when answering a call - calibration

Sometimes the problem is a software update, for example, which for some reason causes the proximity sensor to deregulate.

In this case, you can use a free application that, when installed in several steps, can calibrate the sensor, for example, Proximity Sensor Reset.

Using it is not difficult - a wizard will guide you through the entire process, and at the end you must confirm the new calibration, which will reboot the phone.

After this, you can see if the calibration helped and now the phone screen does not go dark during a call.

Solution three when the phone screen goes blank during an outgoing call - restore factory settings

Another option that you can try is to restore your phone to factory settings.

Unfortunately, this option deletes all data from the phone, so be sure to copy files, photos, music, videos, contacts, SMS and others to a safe place.

Then go to Settings > Backup & Reset and select Factory Reset.

Depending on the brand and software version installed, the factory settings may also be located in a different location.

After confirmation, the phone will reboot and all data will be deleted and the device settings will be reset to factory defaults.

When you turn on your phone for the first time, you need to re-enter the settings (choose a language, sign in to your Google account, etc.).

After completing the operation, make sure that the screen works correctly during a call and does not go dark.

Solution four if the phone screen goes blank - turn off the sensor

If your phone is no longer under warranty, and all other solutions have failed, then the sensor is likely physically damaged, so the screen turns off immediately after the call starts.

If you don't want to spend money on maintenance, then disable turning off the screen during a call.

As a result, the screen will be constantly lit during a call, and you can use the on-screen buttons to activate the speakerphone or remove the keyboard.

The disadvantage of this solution is that when we talk to the illuminated screen, we may accidentally press the buttons.

In order to be able to disable the proximity sensor, you will need to install a special Xposed Framework module.

To do this, you need to get ROOT() to get administrative privileges,

Phone screen still goes blank - some proven tips

Some owners were helped by the option of cleaning the speaker mesh. Sometimes there is a motion sensor there. Take a small brush and carefully clean everything - maybe it will help you too

Judging by the reviews, most often the screen goes blank when making calls on a Sony z3 compact phone. Many people managed to solve this problem by pressing on the upper right corner (the sensor should be located there).

There are cases that on the Xperia Z3, when you press hard on the top of the screen, you can even hear a click inside and the problem disappears.

Some smartphones have an intelligent processing option in the call settings - try turning it off if you find it.

On Sony phones, very often the screen peels off from the body and this problem arises - careful gluing solves it.

You can also disable the incall ui application in the application settings. If this does not help, then in the notification settings, try turning on notifications for this application.

Of course, other reasons cannot be ruled out, but I’ll leave it at that. As they say, I helped as much as I could. Good luck.