Owners of Xiaomi’s flagship Mi 10 Pro smartphone often face the need to understand the hardware configuration of their device accurately, especially when it comes to sensors that affect basic ergonomics. The question of where exactly the Xiaomi 10 Pro proximity sensor is located becomes critical when there are problems with screen quenching during a conversation or false positives in the pocket. Unlike budget models, where the sensor is often hidden under the screen or combined with a speaker, in this model, engineers applied an advanced technology that requires a special approach to diagnosis.
Knowing the exact location of the infrared emitter and receiver is essential not only for theoretical understanding of the device, but also for proper calibration or adhesion of the protective glass. Errors in determining the sensitivity zone can cause even a quality film to override the signal, making the phone partially inoperable in the call mode. Below we will discuss in detail the architecture of the upper part of the case and answer all the questions related to this component.
Technology of placement and absence of visible opening
The first thing that catches your eye when looking at the top bezels of the Xiaomi Mi 10 Pro is the absence of the classic black oval or dot next to the conversational speaker that many are used to in older smartphones. It's not a design error or the lack of a sensor, but the introduction of ultrasonic distance sensor technology. In this model, the physical infrared sensor is replaced with an ultrasonic system that is integrated directly into the body under the screen and the top bezel without requiring a visible hole on the front panel.
The principle is to emit ultrasonic waves that bounce off objects (like the cheeks or ear) and return to the receiver. The system analyzes the delay time of the signal and determines the distance to the object with high accuracy. This allows you to increase the usable area of the screen and improve the moisture protection of the device, because the absence of unnecessary holes reduces the risk of water entering the housing, which is why finding a hole on the front panel is useless.
Why is an ultrasound sensor better than an IR?
It’s worth noting that the lack of visible element often confuses users trying to manually calibrate by covering different parts of the screen with their finger. It’s important to understand that the sensitivity zone in the Xiaomi 10 Pro is distributed over a specific area at the top of the display, but not tied to one specific point on the surface of the glass, which makes the device more reliable in operation, but complicates the diagnostics by software methods.
Physical layout of components
Despite the stealth of the technology, the physical location of the module inside the smartphone is strictly determined by the engineering layout of the assembly. The proximity sensor in the Xiaomi Mi 10 Pro is located at the top of the device, directly behind the screen, in the area above the speaker. If you look at the projection on the front panel, the active zone covers the upper 1-2 centimeters of the display, this is where the ultrasonic waves interact with the external environment.
When you disassemble the device, you can see that the touch module is attached to the inside of the frame or integrated into the plume of the display module, depending on the revision of the board. It requires a complete removal of the screen, since it is hidden under a layer of glass and matrix, which confirms that any manipulation of cleaning or replacing the sensor without removing the display is impossible and requires professional equipment.
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The sensor in Xiaomi 10 Pro is hidden under the screen at the top and has no visible hole on the body.
The table below compares the location of sensors across generations of Xiaomi flagships so you can see the evolution of engineering solutions:
| Smartphone model | Type of sensor | Location. | Visibility on the hull |
|---|---|---|---|
| Xiaomi Mi 9 | Infrared (IR) | Top frame | Black spot on the left |
| Xiaomi Mi 10 | Ultrasonic. | Under the screen (top) | Absent. |
| Xiaomi Mi 10 Pro | Ultrasonic. | Under the screen (top) | Absent. |
| Xiaomi Mi 11 | Virtual (screen) | Built into the display | Absent. |
Understanding this scheme helps avoid common mistakes, such as trying to wipe a non-existent hole with alcohol or sticking a sticker exactly where the user thinks the sensor should be. In the Xiaomi Mi 10 Pro, the entire upper part of the screen is the work area for the proximity system, which requires special care when choosing accessories.
Influence of protective glasses and accessories
One of the most common causes of incorrect proximity sensor on Xiaomi Mi 10 Pro are improperly selected protective glass or films. Because the sensor is ultrasonic and is located under the glass, the thickness and material of the protective layer can critically affect the passage of the signal. Some cheap glasses with a thick adhesive layer or a black frame around the perimeter can block the scanning area.
The most important thing to consider is full-glue glass, which, if the black frame is too wide or offset when it is labeled, can physically block ultrasonic waves, causing the phone to think it is in the ear and to turn off the screen at inappropriate times, such as watching videos or reading.
High-sided cases can also cause problems. If the side of the case enters the screen area at the top, this can create a false echo for the ultrasonic sensor. It is recommended to check the device immediately after installing a new case by making a test call. If the screen goes out instantly when you bring the phone to your face, but does not respond to removal, it may interfere with the operation of the system.
Software calibration and engineering menu
Although the sensor is physically hidden, it can be checked and calibrated software through the MIUI engineering menu, which is standard procedure for diagnosing hardware components. To enter the testing menu, you need to open the Phone app and enter a special code that activates the hidden settings section, which makes sure that the problem is not physical damage, but a software failure.
The command is entered through the dialer. After entering the code ##6484##, the CIT menu will open. In this list, you need to find the item responsible for the Proximity Sensor. By clicking on it, you will enter the testing mode, where you will close the top of the screen with your hand and watch for the change in readings (usually the values change from 0 to 1 or 5.0 to 0.0).
☑️ Diagnostics of the sensor in CIT
If in test mode the sensor responds instantly and correctly, but behaves strangely in normal calls, the problem may be in the software or a specific call app. In this case, it helps to reset the sensor settings through the same engineering menu or clear the data of the phone application. CIT-The test shows no reaction (value does not change), this may indicate a hardware defect of the plume or the module itself.
Typical malfunctions and methods of their elimination
Despite the reliability of the ultrasonic technology, Xiaomi Mi 10 Pro users sometimes experience characteristic malfunctions, most often a “sticking” of the sensor, when the screen goes out immediately after the start of the call and does not light up until you push the phone away a significant distance.
The first step in troubleshooting should be to thoroughly clean the top of the screen. Fat spots, glue residues from old glass, or even a dense layer of dirt can distort the ultrasonic signal. Use a soft microfiber and a special tool to clean the screens. If mechanical cleaning does not help, try rebooting the device to Safe Mode to eliminate the influence of third-party applications.
⚠️ Warning: Do not try to warm up the top of the screen with a hairdryer to "revive" the sensor. The ultrazooque module is sensitive to temperature, and overheating can damage the adhesive layer of the display or the sensor itself.
In the case of software methods and cleaning fail, hardware failure is likely, this can be the drainage of the plume, the oxidation of contacts after moisture (even condensation), or the failure of the emitter itself, in such situations, skilled repairs are required in the service center, where specialists can check the integrity of the power chains of the sensor.
Features of repair and replacement of the module
Replacing the proximity sensor with the Xiaomi Mi 10 Pro is a complex procedure that almost always requires removing the display module. Because the sensor is integrated into the design under the screen, it is impossible to reach it through minimal dismantling. This distinguishes the model from older versions, where the sensor was changed separately in 10-15 minutes.
The repair process involves carefully unplugging the screen (often heated), disabling the plumes, and replacing either the ultrasonic module itself or the plume on which it is mounted. It is important to use original components, as third-party counterparts may not work correctly with the calibration data of the MIUI firmware.
Can I use my phone without a sensor?
After the replacement, the recalibration is carried out through the engineering menu, without which the new sensor may not work properly, because the sensitivity thresholds will be knocked down. Professional craftsmen use special calibration plates to fine-tune the response distance.
⚠️ WARNING: Self-disassembly of Xiaomi 10 Pro to replace the proximity sensor is almost guaranteed to damage the display or loss of moisture protection.