Xiaomi smartphone owners often face a situation where the screen goes out during a conversation or, conversely, does not respond to the lift of the device to the ear. On the Redmi Note 10, this issue is especially acute due to the design of the display and the introduction of modern technologies. Understanding where the proximity sensor is located is key to solving most problems with calls.
Unlike older models, where the sensor often took a prominent place in the top bezel, Redmi Note 10 engineers used hidden integration to increase the usable screen area, but complicates the diagnosis of the user. In this article, we will discuss in detail the physical location of the element, the software nuances of its operation and methods of troubleshooting.
There is a common misconception that the sensor is under a bang or a camera notch, but it uses virtual sensor technology that works in conjunction with the accelerometer and gyroscope, which means that the physical window may be missing, and the system's response depends on complex software processing of the phone's position in space.
If your smartphone is no longer responsive to the face, don't rush to bring it to the service. Often the problem lies in contamination, software failure or improperly pasted protective film. Proper diagnosis will save time and money, returning the device to its former functionality.
Physical location and technology of Virtual Proximity Sensor
The Xiaomi Redmi Note 10 doesn't have a separate, visible window on its front panel, and its engineers have integrated it directly under the display, or used a combination of other sensors to emulate it. Most of the time, it uses Virtual Proximity Sensor technology. It relies on accelerometer data: when you hold the phone to your ear, the gravitational field changes, and the system locks the screen.
Physically, the components that do this can be hidden in the top of the body, next to the speaker, but unlike infrared sensors, there is no direct emitter that can be stuck with a finger, which creates specific operating conditions where the phone can respond to sudden movements or a certain position of the hand.
⚠️ Warning: Don't try to find the black glass of the sensor and clean it with aggressive chemistry. In the Redmi Note 10, you can damage the oleophobic coating of the display or the screen itself, since the visible element simply does not exist in the usual sense.
Using a virtual sensor makes the screen bezel thinner, but requires more precise calibration. If the software receives conflicting data from the gyroscope, the screen can go out in your pocket or dial, which is why understanding the accelerometer in conjunction with the proximity sensor is so important to the owner.
It is worth noting that some modifications or regions may use a hybrid method, but the software method remains dominant, making the device more vulnerable to software bugs after MIUI updates, but more resistant to physical dust contamination.
Diagnostics through engineering menu and tests
To test the system, Redmi Note 10 has a built-in engineering menu that separates a software failure from a hardware malfunction, and to get into it, you need to enter a special code in the Phone app, which is the first step that every user must take before accessing the service.
Type ##6484## to enter CIT (Customer Interface Test) mode. In the list that opens, look for the Proximity Sensor. Here you will see two values: Distance (distance) and State (state). In a normal state, when nothing closes the top of the phone, Distance should be 5.0 (or close to 5.0) and State 1.0 (far).
When you hold your hand to the top of the screen (about 2 cm), the values should change: Distance will become 0.0, and State will become 0.0 (near). If the reaction is delayed or the values do not change at all, this indicates a problem. It is important to test in a calm state, putting the phone on a flat surface.
There is also a second code to check that doesn't work on all firmware: ##7726##. It triggers a deeper diagnosis, but in most cases the basic CIT menu is enough. If the test shows unstable results, try restarting the device and repeating the procedure.
The table below shows the basic codes and their purpose for sensor diagnostics:
| Code. | Function | What we check. |
|---|---|---|
| ##6484## | CIT Menu | Complete diagnosis of all sensors |
| ##7726## | Hardware Test | Alternative iron test |
| *#06# | IMEI Info | Checking serial numbers (indirectly) |
Software calibration of the sensor
If the tests show errors, but the sensor responds, forced calibration often helps. In Redmi Note 10, this process is built into the same engineering menu where the diagnosis was performed. Calibration resets the reference values recorded in the sensor's memory and sets new ones.
To do this, go to the Proximity Sensor section of the CIT menu. Press Calibration or Start. The instruction will appear on the screen: "Do not cover the sensor." Make sure the front panel is clean, and press OK. The system will record the value "away."
Then you'll be asked to close the sensor. Hold your hand tightly to the top of the screen until the timer passes or the display changes. Once you've completed it, you'll see a message called "Pass" or "Calibration Success."
☑️ Calibration checklist
After calibration, be sure to reboot the device. Sometimes it takes the system time to apply new parameters. If the calibration does not help the first time, repeat the procedure 2-3 times. This is a common practice for "training" the sensor.
⚠️ Warning: Do not interrupt the calibration process. If you remove your hand early or the lock screen turns on, the data may be written incorrectly, which will exacerbate the problem.
Influence of accessories and protective glasses
One of the most common causes of sensor malfunction on the Redmi Note 10 is security accessories. Because the sensor is virtual or hidden, any thickening at the top of the screen can distort the accelerometer readings or cause interference.
Full Glue often overlaps areas important to sensors. Even if the glass is transparent, its thickness can make errors. Cheap films can have a static charge that also affects the touchscreen and adjacent sensors.
It is recommended to use accessories specially designed for this model, with cutouts or thin edges. If the problem occurs immediately after the new glass is stickered, remove it and check the sensor, 80% of the time this solves the problem.
Also, look at the covers. If the side of the case is too high and hangs over the screen, the phone may "think" it's in your pocket or your ear, especially for magnetically clasped bookcases that can affect the magnetometer.
Magnet influence
Sensitivity settings and system parameters
Xiaomi’s standard settings menu does not have the sensor sensitivity slider as it did in older versions of Android. However, there are hidden settings and developer settings that can affect screen behavior. To access them, go to Settings → About Phone and click on the MIUI version 7 times.
In the Advanced Settings menu → For developers, you can find options related to animation and screen behavior, but there is no direct sensor adjustment. The main effect is the Mode in the pocket function. It is located in the Security application → Mode in the pocket.
If this function is not working properly, the screen may go out in your hand, try turning it off or turn it on if you have a cheap security glass, sometimes switching the status of this option resets the cache of the corresponding services.
Also, check your lock settings. Go to Settings → Lock screen and make sure that the "Preventing accidental switching on in your pocket" function is active. This is a software filter that ignores false sensor signals.
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Useful advice: If the screen goes out during a speakerphone conversation, check if you're putting your palm over the top of the phone. A virtual sensor might think of it as an earlift.
Radical methods and resetting settings
If software methods don't work, you can try more radical measures. Resetting all settings to factory settings (Settings → About Phone → Resetting) often eliminates deep software conflicts. Be sure to back up the data before doing so.
Sometimes the problem lies in a specific MIUI update. In Redmi Note 10 user communities, you can find bug reports in specific firmware versions. If the problem started after the update, waiting for a patch or rolling back on the previous version may be the only solutions.
There is also a method of disabling the sensor through ADB-commands, but it requires a computer and command line skills. proximity_on_off 0 (The code may vary depending on the Android version) may turn off the sensor completely, but it will deprive you of the screen-off feature when talking.
⚠️ Attention: Use ADB-Commands and modifications to system files can lead to system instability or loss of warranty. Use these methods only if you are confident in your actions.
In extreme cases, if nothing helps, the option of flashing the device through the Mi Flash Tool is guaranteed to eliminate software errors, but it takes time and the presence of a PC. Always use official firmware for your region.
Hardware repair: when it's time to go to service
When all software methods are exhausted and the CIT test shows no reaction (values do not change even when the zone is closed), a hardware malfunction is likely. In the Redmi Note 10, the proximity sensor is often part of the display plume or a separate module under the screen.
Signs of hardware breakdown:
- 📱 The screen never goes out during a conversation, even when pressed tightly.
- 📱 The screen goes out chaoticly, without touching the ear, and does not turn on.
- 📱 In the engineering menu, the Distance and State values do not change (always 0 or always 5).
Replacing the sensor in this model is a complex process. Often, it requires removing the display or even completely replacing it if the sensor is built into the matrix. The cost of such repairs can be substantial. In some cases, the wizards offer an external IR sensor, but it requires drilling the body and looks unaesthetic.
If the phone is on warranty, and you did not use unoriginal windows or drop it, safely carry to an authorized center.
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In 90% of cases on the Redmi Note 10, the problem is solved by calibration through the CIT-It's a rare thing to have a hardware breakdown.