Xiaomi’s smartphones, including the popular Redmi 10, feature a variety of sensors that make it comfortable and safe to use. One key element is a sensor that responds to the distance of the object, allowing the screen to be turned off automatically during a conversation. However, users often face a situation where this feature stops working correctly and the screen remains on when the phone is pressed to the ear, which leads to accidental cheek pressing, switching to speakerphone or even interrupting a call.
In most cases, the problem is not a physical failure, but a software failure or downgraded calibration of the MIUI system. Modern Android operating shells allow you to fine-tune the operation of the equipment, but sometimes standard settings hide access to the necessary parameters. Understanding how to turn on the proximity sensor and calibrate it correctly can solve the problem without going to the service center. In this article, we will discuss in detail all available methods for diagnosing and activating the sensor.
It’s worth noting that ignoring this issue can significantly reduce the usability of your gadget. Imagine that during an important conversation you accidentally press the end button or turn on the microphone while talking in silence. That’s why setting up the distance sensor in a timely manner is an important step in the maintenance of your Xiaomi Redmi 10. Below are step-by-step instructions to help return the device to factory functionality.
The operating principle and location of the sensor on the Redmi 10
To solve this problem effectively, you need to understand how the object detection system in your phone works. The Redmi 10 uses an infrared sensor that constantly emits an invisible beam and analyzes its reflection. If the beam bounces off an object (like your ear) and returns to the receiver, the system receives a proximity signal.
The location of this element on the body of the smartphone can vary depending on the modification, but most often it is located at the top of the front panel, next to the speaker. In some versions, the sensor can be combined with the front camera module or hidden under the layer of glass of the display. It is important to keep this area clean, since contamination can distort the readings. Infrared radiation is easily blocked by greasy spots or a dense protective film.
⚠️ Attention: Using thick protective glasses or films with a black border over the top of the screen can physically block the sensor.
The sensor technology involves constantly monitoring the space in front of the screen, and if you notice that the screen goes out when you just hold the phone in front of you, or, conversely, does not respond to the head, this indicates that calibration is necessary. The system may have lost the reference distance values necessary to work properly. Understanding the physical limitations of the device will help you avoid false positives in the future.
Basic verification and inclusion in standard settings
Before you get to the complex engineering menu, make sure that the feature is activated in the basic user interface. In the MIUI shell installed on Redmi 10, sensor management is often hidden in the special features menu or call settings. Sometimes after the system update, the settings can reset to factory ones, where some functions are disabled by default.
For the initial inspection, perform the following steps:
- 📱 Open the Phone app and go to the call settings menu.
- 🔍 Find the option “Mode in your pocket” or “approximation sensor».
- ✅ Make sure the switch opposite the desired function is active and lit in blue.
If you don't find an explicit switch in the standard menu, it doesn't mean that the function is disabled. In recent versions of MIUI, sensor management is often integrated directly into the algorithms of the lock and call screen. However, there is a hidden engineering menu that gives access to deep hardware tuning, accessed through a set of special code in the Phone application.
Entering the code ##6484## will open the CIT (Customer Information Test) menu for component testing, and you can find the section for Proximity Sensor, and clicking on it, you can see the current sensor readings in real time. If you put your hand up to the top of the phone, the values change (e.g., from 5.0 to 0.0), then the part is good and the software is the problem.
Calibration of the sensor through the engineering menu
The most effective way to solve this problem is forced calibration, which causes Xiaomi to re-remember the minimum and maximum distance to the object. Often it is the downed calibration data that causes the screen to stay on or go out too early. You will need access to the same CIT menu to perform the procedure.
The calibration process is as follows:
- 🛠️ In the test menu, select “Proximity Sensor».
- 👐 Close the top of the screen with your palm, simulating a phone conversation.
- 📉 Click the “Calibration” or “Start” button if it is available in the interface.
- 🔄 Repeat the action several times until the system gives a success message.
Some firmware versions may not automatically calibrate, so you can try resetting the sensor data via the Recovery Mode menu, turning off the phone, pressing the Volume Up + Power button combination, and selecting "Wipe Data" (with pre-reserve backup), which will return all system settings, including sensor settings, to factory values.
☑️ Checklist before calibration
After calibration, be sure to restart the device. The first run may take longer, as the system will recalculate the hardware parameters. If the problem persists after the reboot, you may need to deeper intervention into the system via USB debugging, but this requires a computer and an ADB driver installed.
Using third-party applications to set up
If Xiaomi’s built-in tools don’t work, specialized apps from the Google Play store come to the rescue. Developers have created many utilities that allow you to force the sensor to activate or change the threshold of its sensitivity. One of the most popular and proven tools is the Proximity Sensor Reset & Test application.
Advantages of using third-party software:
- 📲 Ability to fine-tune the sensor sensitivity.
- 📊 Maintaining a log of events and graphs of the sensor.
- 🚀 Automatic reset calibration when starting the application.
When you install an app, make sure you give it the permissions you need, you usually need access to phone calls and sensors of the device, and then start testing, and the app will show you a graph of how the distance changes, and if the graph jumps without you, it may be that the sensor is physically defective or that it is heavily contaminated from the inside.
⚠️ Note: Only download system sensor applications from trusted sources, such as the official Google Play Store. Programs from unknown sites may contain malicious code that can steal your personal data.
Some apps also offer Force Enable, which attempts to activate the sensor driver even if the system considers it disabled, but should be used with caution, as the driver conflict can cause the entire smartphone to work unstable. Forced activation through third-party software only works if the physical sensor is functional and determined by the system.
Diagnostics of hardware faults
When software methods are exhausted, it remains to check the physical condition of the device. In Redmi 10, as in many modern smartphones, the proximity sensor can fail due to a fall, moisture or production defect. If the screen does not respond to the approach of objects even in the engineering menu, the probability of hardware failure is high.
What to look for in the diagnosis:
- 💧 Has the water been in the upper speaker area recently?
- 📉 Were there heavy hits or phone drops screen down?
- 🔌 Changed the display or glass in untested services?
A common cause of failure is the slipping of the plume connecting the sensor to the motherboard, which can happen after a strong impact, in which case only disassembling the device and reconnecting the plume helps. It is also worth checking whether the sensor is glued if the screen was replaced recently.
| Symptoms. | Probable cause | Method of decision |
|---|---|---|
| The screen doesn't go out when you ring. | Failure to calibrate or pollute | Calibration in CIT, screen cleaning |
| The screen goes out in your hand | High sensitivity or film | Film removal, setting reset. |
| Sensor not detectable | Breakage of plume or breakage | Repairs at the service centre |
| Black screen after the call | Sensor sticking | Reset, wait, wait. |
If you suspect a hardware malfunction, don't try to disassemble the phone yourself if you don't have experience.The internal design of the Redmi 10 is compact enough that careless handling can damage other components, such as the battery or display plumes.
Impact of MIUI Updates and Resetting
Xiaomi regularly releases updates to its MIUI shell that may contain sensor bug fixes. However, the opposite happens: the new update brings bugs that disrupt previously functioning modules. If the problem appeared immediately after the system update, it makes sense to wait for the patch or try to roll back on the previous version of the firmware.
Factory Reset is a radical but often effective method that removes all user data and returns the phone to the “out of the box” state. Before doing so, make sure to back up your contacts, photos and apps. Once reset, the system reconfigures all drivers, which often eliminates software conflicts.
How to make a backup copy before resetting?
It’s also worth checking for updates for specific system applications, such as Google Play Services or System Framework. Sometimes the bug isn’t in the firmware itself, but in outdated Android components that don’t interact properly with the sensor driver. Updating all components through Google Play can solve the problem without completely reflashing.
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If the problem persists after resetting, try not to install applications from backup immediately. Check the sensor on a clean system to avoid conflict with third-party software.
In conclusion, setting up the proximity sensor on Xiaomi Redmi 10 is a software-based process that is 90% of the time: Start by cleaning the screen and calibrating through the engineering menu before you break down. A competent diagnostic approach will save you time and money.
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Proper calibration in the CIT engineering menu solves the problem of incorrect operation of the proximity sensor in most cases without the need for repair.