How to set up the proximity sensor on Xiaomi Note 10: the complete guide

The proximity sensor problem on Xiaomi smartphones is a classic situation that many users face: the screen can go out during a conversation, do not light up when you lift it to the ear or, conversely, constantly glow in your pocket, making random calls. For owners of the Xiaomi Note 10 model, this issue is especially relevant due to the design of the front camera and the location of the sensor under the display.

In most cases, a software failure is easily fixed by correct calibration or simply resetting the system settings. However, before you carry the device to the service, you should try to perform a number of independent actions. The proximity sensor is responsible for locking the screen during a conversation, and its incorrect operation can significantly reduce the comfort of using the gadget.

In this article, we will explore all the available methods of solving the problem, from the banal check of the security glass to the use of hidden engineering codes, you will learn how to make an accurate diagnosis and return the device to the correct response to your actions.

Reasons for the incorrect operation of the sensor

Before you start complex manipulations, you need to rule out physical factors. Often the problem lies in the banal contamination of the top of the screen or the use of poor quality protective film. If the protective glass covers the area of the sensor, the signal is distorted, and the system can not correctly determine the distance to the object.

Software conflicts are also worth considering. Once you update your MIUI shell or install third-party applications for calls, settings can get lost. System errors sometimes cause the device driver to stop receiving correct data from the hardware module.

• 🧐 Pollution of the upper frame of the screen with dust or greasy traces.
• 🛡️ Incorrectly pasted protective glass overriding the sensor.
• ⚙️ Failure in the work of firmware or conflict with the application-caller.
• 🔋 Battery discharge or voltage surges that cause a temporary failure of the controller.

⚠️ Note: If you have recently changed the display or repaired, the problem may be the lack of a calibration sticker or improper assembly of the module.

Sometimes static electricity is the cause, and when you're dry or wearing a phone in synthetic clothing, you can build up a charge on the screen that blocks the capacitive sensors, and simply turning the device off and on often helps to remove that charge and restore normal operation.

Diagnostics through the Engineering Menu

The first step to pinpoint the problem is to check the sensor through the built-in engineering menu. Xiaomi smartphones have a special code that allows you to test all hardware modules, and this is the most reliable way to know if the hardware is physically working.

To enter the test mode, open the Phone app and dial the combination ##6484##. If the code is entered correctly, the CIT (Customer Integration Test) menu will open. In the list of tests, you need to find the item "Proximity Sensor" or "Proximity Sensor".

In the window that opens, you will see the current distance in centimeters. When you hold your palm to the top of the screen (where the speaker is), the value should change from 5.0 cm to 0.0 cm. If the numbers change, then the sensor is physically healthy, and you need to look for the problem in the software part.

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If the values in the engineering menu jump randomly even without a hand, it is possible that the sensor is contaminated from the inside or has a physical defect.

It is important to test in a calm environment, without the bright direct sunlight that can blind an optical sensor. Place your phone on a flat surface and make sure nothing covers the top of the display.

Calibration of the proximity sensor

If the diagnostics show that the sensor is responding but is not doing it correctly (e.g., it is turning off the screen too soon or later), calibration is necessary. This procedure “trains” the system to correctly interpret the data received from the module. On the Xiaomi Note 10, this can be done right in the same engineering menu.

When you're in the Proximity Sensor, you press the Calibration button, you're asked to remove your hand from the screen, then close the sensor with your palm, the system will record the minimum and maximum values, setting the correct range of operation, and when you successfully complete it, you'll see "Pass" or "Calibration Success."

Some versions of MIUI firmware offer automatic calibration via settings. Go to Settings → Advanced Settings → Approximation Sensor (the path may vary depending on the Android version). If you don't, use the engineering code.

After calibration, be sure to check the phone's performance in a real conversation. Call someone or voicemail number to make sure the screen goes out the moment the phone is brought to your ear, not earlier.

Resetting settings through the “Services” application

If manual calibration fails, you can use a system reset of sensor settings. In the shell of MIUI there is a built-in service app (or "Services & Feedback"), which allows you to perform a calibration reset without losing personal data.

Open the Services app, go to Testing or Device Check. Find the proximity sensor in the list. Often there's a Reset Calibration button or the ability to re-run the test with automatic setting updates, which force you to overwrite the sensor configuration file.

It's also worth checking if Pocket Mode is enabled, which is designed to prevent accidental taps, but sometimes it's too aggressive. It's in Settings → Lock screen. Try turning it off and see if the sensor behavior changes.

⚠️ Warning: Don't use third-party apps from Play Market to calibrate sensors unless urgently needed. Xiaomi's system tools work more accurately and securely for the operating system.

Problems after system update

Often users notice strange behavior of the sensor immediately after updating the Android operating system or the MIUI shell. This is due to the fact that new versions of the firmware can change the algorithms of the sensors or contain software bugs.

In such cases, cleaning the cache of system applications helps. Go to Settings → Apps → All applications, find Phone and System Interface. Select Memory and click Clear Cache. This will not delete your contacts, but will reset temporary files that may have been corrupted during the update.

If the problem occurs after installing the beta version of the firmware, it makes sense to roll back to a stable version. Beta versions often contain errors that are fixed in release builds. For Xiaomi Note 10, the stability of sensors in official firmware is usually higher.

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Failures after an update are temporary, and often just wait a couple of days or clean the cache to make the system adapt.

Also check for updates for the Phone app itself through Google Play Market. Developers often release patches for standard apps separately from system-wide updates.

Cardinal measures: full reset

If none of the above methods worked, the last software option is a full reset to factory settings (Hard Reset), which is guaranteed to eliminate any software conflicts, but requires the prior storage of all important data.

Before reset, be sure to back up your contacts, photos and documents to the Mi Cloud or your computer. Once reset, your phone will return to a store-like state and all user data will be deleted without recovery.

Settings → About the phone → Reset settings → Erase all data

After you reboot, don't install all the apps at once. First, check the sensor on the clean system, and if it's working correctly, it means that one of the previously installed applications or a deep system failure was the problem.

⚠️ Attention: A complete reset will not help if the problem is of a hardware nature (physical failure of the sensor, plume or controller). If after the reset the sensor still does not work - the way is only to the service center.

FAQ: Frequently Asked Questions