How to set up and calibrate the proximity sensor Xiaomi Mi 10 Lite

Modern Xiaomi Mi 10 Lite smartphones are equipped with advanced technology, but even flagship devices sometimes face software failures that affect basic functionality. One of the most common problems users face is the incorrect operation of the sensor responsible for locking the screen during a conversation. When you hold the phone to your ear, the screen should go out, preventing accidental cheek pressing, but if this does not happen, using the device becomes extremely uncomfortable.

Most of the time, it's not because of a physical malfunction, but because of the software settings or the contamination of the top of the display, and the proximity sensor is an infrared emitter and receiver that require precise calibration to work properly, and because you have access to hidden engineering menus, you can solve the problem without going to a service center.

In this article, we will discuss in detail the diagnostic algorithms, software configuration methods and methods of forced resetting of sensor parameters. You will learn how to properly clean the signal reception zone, what commands to enter into the engineering menu and why installing protective glasses can cause a malfunction. Xiaomi Mi 10 Lite has its own sensor location features that must be considered when performing recovery procedures.

Diagnosis and the main causes of failures

Before you start to complex manipulation of system files or engineering menus, you need to exclude external factors that can block the sensor. Often users mistakenly believe that the problem is hardware, whereas it is trivial in the protective film or case. Incorrectly pasted security glass can block the infrared port located at the top of the display next to the speaker.

You should carefully examine the top of the smartphone in bright light. Pollution, dust or greasy fingerprints can scatter the infrared beam, which makes the sensor “think” that it is constantly in front of the object. It is also worth checking whether there is a third-party launcher or theme that conflicts with the system processes of screen management. In rare cases, the cause is a recent firmware update that may have made errors in drivers.

To test the component's performance first, you can use the built-in test menu, which is a safe way to tell if the hardware is responding to your actions at all, and if the sensor shows constant activity or complete inoperability in the test, it narrows the search for causes.

• 🔍 Check for a protective film or glass covering the top of the screen.
• 🧹 Wipe the area above the display with a soft microfiber cloth soaked in alcohol.
• 📱 Remove the case to exclude its effect on the work of sensors.
• 🔄 Restart the device in Safe Mode to eliminate application conflict.

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Before starting a diagnosis, be sure to back up important data, as some setup methods may require resetting the system settings.

Checking through CIT's engineering menu

The most accurate tool for checking the status of sensors in the MIUI shell is the CIT menu, which is designed for engineers and service centers, but is also available for ordinary users to conduct self-diagnosis.

Once you enter the menu, you will see a list of all the components you're testing, and you'll find a item that's associated with the Proximity Sensor or the Approximation Sensor. When you start the test, the screen will usually turn white or black, and the system will read the readings. Hold your hand to the top of the smartphone and remove it: the values should change from 0.0 to 5.0 (or vice versa, depending on the software version), which indicates that the hardware is in good shape.

If the values don't change or "jump" without you, it can indicate a software failure or physical damage to the plume. In the case when the test is successful, but in normal calls the screen does not go out, the problem lies in the calibration settings, which we will discuss in the next sections. It is important not to panic if the test shows an error the first time - try to restart the phone and repeat the procedure.

Calibration of the sensor through the hidden menu

If the diagnostics show that the sensor is responding to obstacles but is not doing it correctly (for example, it only turns off the screen at point-blank range or, on the contrary, does not react close), a forced calibration is necessary. This procedure “trains” the system to correctly determine the distance to the object. For the Xiaomi Mi 10 Lite, this process often solves problems that arose after replacing the display or updating Android.

The calibration menu is often accessed in the same way via CIT, but with calibration options, or through special codes that depend on the regional firmware version (Global, China, EEA). In some cases, you need to go to the Settings menu → About Phone → Version of the kernel and repeatedly click on the “kernel version”, although newer versions of MIUI often block this method. The most reliable method is to use the # #6484# code to log in to the CIT and then select the appropriate test.

In the calibration process, the system will ask you to remove your hand from the phone and then close the sensor. You must follow the instructions on the screen strictly. If the calibration fails, try clearing the cache of the Phone application and system process services, and then try again. Sometimes it takes several calibration cycles to stabilize the readings.

⚠️ Warning: Do not interrupt the calibration process by force rebooting.This can cause the sensor to reset in an incorrect state, after which the screen may stop lighting up altogether.

Resetting sensor data via ADB

For advanced users who have not had a good experience with standard methods, it is possible to reset sensor configuration files via USB debugging. This method requires a computer, an ADB driver installed, and a debugging mode enabled on the smartphone. This approach allows you to clear the system caches responsible for storing calibration data.

Before starting the procedure, make sure that the computer has ADB drivers installed. Connect the smartphone with a cable and allow debugging in the pop-up window on the device screen. Open the command line or terminal on the PC and enter a command to check the connection. If the device is determined, you can proceed to delete configuration files.

You have to execute a command to delete the file that stores the calibration data. The path may vary depending on the Android version, but most often it's a file in the persist directory. Once the file is deleted and rebooted, the system will create a new configuration file with factory settings, which is equivalent to completely resetting the sensor settings.

adb shell rm /persist/sensors/prox_calib_data

Or, depending on the firmware version:

adb shell pm clear com.android.phone

Once you have completed the command, be sure to restart the device. If the problem persists after the reboot, the persist partition may be damaged, which requires deeper intervention or firmware reflashing.

Influence of protective glasses and accessories

Special attention should be paid to the compatibility of accessories with the design of Xiaomi Mi 10 Lite. This smartphone has a narrow frame and a specific location of sensors. Many universal protective glasses, especially those with a black frame or thickening at the edges (3D/5D), can partially overlap the area of the IR sensor.

Even if the glass is flat, the adhesive layer or the material itself can distort the infrared radiation, and as a result, the phone "sees" the obstacle all the time, and the screen does not light up when you remove the phone from your ear, or, conversely, the sensitivity drops so much that the screen does not go out even when you press it tightly.

To test this theory, it is enough to temporarily remove the protective coating and conduct a call test. If the problem disappears, the only solution is to replace the glass with a model specially designed for the Mi 10 Lite, or neatly trimming the black rope in the sensor area (which requires jewelry accuracy).

Radical measures: resetting and reflashing

If none of the software methods worked, and you've made sure there's no physical damage and accessory impact, the final software step is a full reset, which will bring the phone back to factory status by removing all user data, apps and, importantly, potentially conflicting system settings.

Before you reset, make sure that all important contacts and photos are stored in the cloud or on an external medium. The reset can be done through the Recovery Mode menu. To enter it, you need to turn off the phone and pinch the combination of the buttons Volume Up + Power before the Mi logo appears.

In the Recovery menu, select a language (usually English or Chinese), then go to the Wipe Data section and confirm the action. Once the process is complete, the phone will restart. If that doesn't work, there's probably a hardware fault with the plume or the sensor itself, which requires a replacement component in the service center.

⚠️ Warning: A complete data reset will remove all photos, contacts and apps from the phone's internal memory. be sure to back up before starting the procedure.

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90% of proximity sensor problems are solved by removing the wrong protective glass or recalibrating through the CIT menu.

Frequently Asked Questions (FAQ)