Smartphone owners often face the need to fine-tune hardware modules to make the device work properly. In particular, the proximity sensor plays a critical role in the comfort of using the gadget during phone conversations. On the Xiaomi Redmi Note 10 Pro, this element is hidden under the screen, which creates certain difficulties in diagnosing and finding its location.
Understanding the way the sensor works and precisely positioning it allows users to self-correct common problems, such as a non-light screen during a bell or occasional cheek pressing. In this article, we will discuss the physical and software aspects of the module, as well as provide step-by-step instructions for testing it.
We will look at both standard methods of checking through the engineering menu, and the deeper calibration methods available in the MIUI shell. Properly configuring this component greatly improves the usability of your smartphone in everyday life.
Physical location and operating principle of the sensor
Unlike older smartphone models, where the sensor was visible to the naked eye in the top bezel, the Redmi Note 10 Pro uses hidden placement technology. Physically, the proximity sensor is located at the top of the display, directly below the screen matrix, in the area of the conversational speaker, this solution allows the manufacturer to increase the usable area of the screen and create the effect of a single glass surface.
⚠️ Note: Because the sensor is hidden under glass, any attempts to mechanically clean this area with sharp objects or aggressive chemistry can lead to irreversible damage to the oleophobic coating or the display itself.
The principle of operation is based on emitting infrared rays and analyzing their reflection from nearby objects. When you hold the phone to your ear, the rays bounce off the head, and the system receives a signal that the screen is locked, and if the screen does not go out when you call, this often indicates that this particular hidden area is contaminated or a software failure.
The accuracy of the work depends on the transparency of the protective film and the quality of the glass itself. Using cheap protective glasses with an opaque frame or a thick layer of glue can shift the focus of the infrared emitter, leading to false positives.
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When buying a protective glass for the Redmi Note 10 Pro, make sure that it has a special cutout or a transparent area in the upper speaker area, otherwise the sensor may not work properly.
Diagnostics through CIT Engineering Menu
To accurately locate and check the module, MIUI has a special diagnostic mode, accessed through the standard Phone app by entering a secret combination of characters, the most reliable way to know if the system sees an object in front of the screen.
To enter the test mode, open the dial and enter the code ##6484##. Once the last digit is entered, the CIT menu will open. In the test list, you will find the item "Proximity Sensor" or "Proximity Sensor" and click on it, you will be taken to the check interface.
In this mode, the smartphone screen will change color or display distance values in centimeters. Hold your palm to the top of the screen and slowly move it away. If the values change (from 0 to 5.0 cm or more), then the hardware is intact and the sensor is physically found.
☑️ Testing the sensor in CIT
Software calibration of the sensor
Even if the sensor is physically correct, the software settings can be knocked down, which leads to malfunctioning. In the same engineering menu, after selecting the Proximity Sensor test, a calibration function is available, which helps the system re-determine the zero point and the maximum distance.
To perform the calibration, place your phone on a perfectly flat horizontal surface. Make sure there are no objects above the screen, including fingers, clothes, or overhanging parts of the table. Press the Calibration button at the bottom of the screen and wait for the process to complete.
Once you've calibrated successfully, the system will give you a message, "Calibration Success." If you have an error, repeat the procedure with a soft cloth on top of the screen, sometimes taking several cycles to stabilize the readings.
⚠️ Warning: Do not calibrate with your phone in your hands or at an angle. Any movement or foreign object within radius 2-3 cm from the top edge of the screen will lead to incorrect recording of base values.
What if calibration doesn’t help?
Effects of accessories and pollution
One of the most common reasons why the screen doesn't go out or goes out in your pocket is because of a physical obstacle. In the Redmi Note 10 Pro, the sensitivity zone is located directly above the Redmi logo or directly above the speaker grid, and any dirt, greasy prints or water droplets in this area can distort the signal.
Protective films and glass also make adjustments. Cheap accessories often have less transparency to infrared rays or create glare that the sensor perceives as an obstacle. Removing the protective coating often solves the problem of false positives instantly.
Use microfiber and screens to clean, and do not use pure alcohol or abrasive materials, as these can damage the anti-reflective coating of the matrix, which will also affect the sensor in the long term.
- 🧼 Regularly wipe the top face of your smartphone, removing skin fat and dust.
- 🛡️ Replace the protective glass when chipped or cracked in the speaker area.
- 💧 Avoid getting moisture into the area of the speaker.
- 📱 Check if the cover covers the top of the display.
Comparison of sensor models in the Redmi line
Understanding the differences in design helps to better diagnose problems. The table below compares the location and type of sensors across generations of smartphones, allowing you to understand the evolution of technology in the lineup.
| Smartphone model | Type of sensor | Location. | Features |
|---|---|---|---|
| Redmi Note 8 Pro | Open-ended | In the frame above the screen | Seen to the eye, easy to clean. |
| Redmi Note 9 Pro | Hidden | Under the screen (left) | Sensitive to protective glass |
| Redmi Note 10 Pro | Hidden | Under screen (centre/top) | High sensitivity, calibration is required |
| Redmi Note 11 Pro | Hidden | Under the screen (micro hole) | Minimum frame, complex replacement |
As you can see from the table, the Redmi Note 10 Pro uses a more advanced, but also more capricious hidden placement system, which requires the user to pay more attention to the cleanliness of the screen and the quality of the accessories installed.
Resolving programmatic conflicts
Sometimes the problem is not hardware, but software. Certain applications, especially those that control gestures, lock the screen, or have permissions to access sensors, can take control. Check the list of recently installed applications.
Also worth paying attention to is the Pocket Mode feature, which has an option in the lock settings to prevent accidental taps in your pocket, and if it doesn't work properly, try turning it off or on to check for changes in the system's behavior.
Resetting to factory settings is a last resort, but often helps to eliminate deep software errors.Be sure to back up your data before doing so, as all user settings will be deleted.
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If after resetting the settings and replacing the protective glass the problem persists, a hardware malfunction of the plume or the sensor module itself is likely, which requires contacting the service center.