Many users are faced with a situation where, during a telephone conversation, the screen does not go off when the phone is brought to the ear, or, conversely, goes off at the wrong moment. This is a direct sign that proximity sensor it is not working correctly or was accidentally blocked by a software glitch. In the Android operating system, this sensor is responsible for saving energy and preventing accidental cheek presses, so its serviceability is critical for comfortable communication.
It is not difficult to find the physical location of the sensor, but software access to its settings is often hidden from the average user. Standard menus Android do not always provide direct access to equipment testing, requiring the use of special codes or third-party utilities. In this article we will look at all the ways to detect, check and force enable this module on smartphones from various manufacturers.
It is worth understanding that the location of the sensor may vary depending on the device model and year of manufacture. In modern bezel-less smartphones, manufacturers often hide the sensor under the display or combine it with the speaker, which makes visual identification difficult. However, software diagnostic methods remain universal for the vast majority of devices based on this OS.
Physical location of the sensor on the smartphone body
Before moving on to software checks, you need to visually inspect the top of the front panel of your gadget. Traditionally sensor module located in close proximity to the speaker. Typically this is a small darkened window or simply an area of black glass that may look like part of a dynamic mesh or decorative insert.
On devices with cutouts in the screen (“notch” or “drop”), the sensor is often integrated directly into the cutout area. In models such as Xiaomi or Huawei, it can be moved to the very top end of the case, almost merging with the frame. If you have an old smartphone with wide frames, look for a round or oval hole next to the front camera.
⚠️ Attention: Do not try to physically impact the sensor area with sharp objects or aggressive chemicals. Mechanical damage to the protective glass or the sensor itself will require expensive repairs to the display module.
Some budget models use software emulation or an accelerometer to determine position, but this is rare. Most often you are dealing with a full-fledged infrared or capacitive sensor, which requires a clean surface. Contamination of this area with grease or dust is the most common cause of false alarms.
Use microfiber to clean the top of the screen. Greasy fingerprints can block infrared radiation, causing the phone to think that it is constantly located at the ear.
Using the engineering menu for diagnostics
The most reliable way to find and check the sensor is to enter the system's engineering menu. This is a hidden section Androidintended for developers and service engineers, where you can test all hardware components in real time. It is accessed through a set of special USSD codes in the “Phone” application.
The set of codes depends on the processor and shell manufacturer. For devices on a clean Android or Moto code often works ##7780## or ##4636##. For the popular line Xiaomi i Redmi the combination ##64663##is used, which opens the full CIT testing menu. Smartphones Samsung require input #0#.
What to do if the code does not work?
Some telecom operators block the entry of engineering codes in standard dialing. In this case, try installing a third-party application for calls from the Play Market or use ADB commands through your computer to activate the menu.
After entering the code, a list of tests will open in front of you. You need to find an item with the name Proximity Sensor or simply Proximity. When you press it, the screen may go dark or change color, and when you cover the top of the phone with your palm, the values on the screen should change from 0.0 to 5.0 (or from Far to Near). This means that the sensor has been physically found and is functioning.
1. Open the “Phone” application
2. Enter the manufacturer's code (for example, #0#)
3. Find the Proximity Sensor item
4. Cover the top of the screen with your hand and check the reaction-->
Checking through standard system settings
In some cases, access to sensor control can be accessed through the standard settings menu, although manufacturers are increasingly hiding this option. Usually the path looks like Settings → Accessibility → Proximity sensor. However, on modern versions Android 11-14 this item is often absent, since the system considers the sensor control to be automatic.
If you do not find a separate switch, try looking for the function. "Manage proximity" in the call settings section. The path may look like Phone → Settings → Incoming calls → Proximity sensor. The presence of this menu depends on the specific shell: in MIUI or OneUI such settings are more common than in the stock one Android.
The absence of a switch in the menu does not mean a breakdown. This only indicates that calibration and management is left to the system. If the screen turns off correctly, no intervention is required. It is worth intervening only in case of obvious malfunctions.
| Manufacturer | Code for verification | Location in the menu | Features |
|---|---|---|---|
| Samsung | #0# | Settings → Accessibility | Often requires a reset through the menu |
| Xiaomi / Redmi | ##64663## | Settings → Advanced settings | There is a separate calibration |
| Huawei / Honor | ##2846579## | Settings → Smart help | Hidden in the engineering menu |
| Google Pixel | ##4636## | Not in the standard menu | Only through ADB or tests |
If there is no sensor control in the standard settings, do not try to find hidden configuration files without experience - this may lead to unstable system operation.
Use of third-party applications for testing
When the built-in tools do not give results or seem too complicated, specialized applications from the store come to the rescue. Google Play. They allow you to visualize the operation of the sensor in real time, showing a graph of the distance to the object. This is a great way to understand whether the sensor “sees” your hand.
One of the most popular and proven tools is the application Proximity Sensor Reset/Fix or Test Hardware Info. After installation, launch the app and place the phone on a flat surface. In the application you will see the current sensor value. Move your palm to the top of the screen - the value should change.
⚠️ Attention: Calibration applications require permission to access the system. Make sure that you download software from trusted developers so as not to transfer personal data to third parties.
Some utilities offer a “Fix” or “Calibrate” function. It forcibly overwrites the sensor configuration file. Use this function only if you are sure that the problem is a software glitch and not physical contamination. After the procedure, the phone may require a reboot.
Problems with protective glasses and cases
Often the reason for incorrect operation lies not in the smartphone itself, but in the accessories. Incorrectly applied protective glass may block the infrared port. This is especially true for glasses with a black frame around the perimeter, which on cheap models can be wider than on the original and extend into the sensor area.
Thick book covers with a magnetic clasp can also affect the operation of the sensor if the magnet is poorly positioned or if the cover of the case has a thickening in the area of the speaker. In such cases, the system receives a false approach signal. Remove the case and check the phone's operation without it.
If you recently changed the glass and the problem appeared immediately after that, most likely the technician used glue that flowed into the sensor area, or the glass itself does not have a transparent window in the right place. In such a situation, only replacing the accessory with a better one will help.
When buying a protective glass in a store, ask to try it on your phone. Make sure that the cutouts match the speaker and sensors, and that the black frame does not block the sensor's working area.
Calibrating and resetting the sensor
If the sensor is physically intact, the glass is clean, but the screen behaves strangely, software calibration is required. On devices Xiaomi this is done through the engineering menu: select Proximity Sensor, place the phone on the table, cover the sensor with your hand and press the calibration button (usually the green button or Pass). Then remove your hand and press again.
On other devices that do not have built-in calibration, a complete reset of the sensor settings through the Recovery menu or resetting all phone settings helps. Be sure to back up your data before doing this, as this action will return all system settings to factory defaults.
In rare cases, disabling Pocket Volume Boost or similar audio optimizations that may conflict with proximity data may help. Find these settings in the sound section and try changing their state.
Why is a proximity sensor needed at all?
The main task of the sensor is to turn off the touchscreen (touch layer) during a conversation. Without it, you'd be constantly hanging up calls, putting them on hold, or putting the caller on speakerphone. This is a critical ergonomic function.
Is it possible to completely disable the sensor?
No, not by standard means, since it is a system component. However, there are screen blocking applications or modified firmware that ignore the sensor signals, but this can lead to inconvenience during conversations.
Does a broken screen affect the operation of the sensor?
Yes, if the crack passes through the top of the display where the sensor is located. Damage to the display cable due to an impact can also disrupt the transfer of data from the sensor to the motherboard.
Why is there no separate hole for the sensor on new phones?
Modern technologies make it possible to embed the sensor under the display layer or use ultrasonic technology, which allows you to remove unnecessary holes and increase the usable screen area.