Approximation sensor on Xiaomi 11 Lite 5G NE Not working: full analysis of the problem

Xiaomi 11 Lite 5G NE — It's a popular smartphone with a great value for money, but even it has hardware problems, and one of the most common complaints users have is that the proximity sensor is not working properly. This sensor is responsible for turning off the screen during a conversation, preventing accidental tapping of the cheek or ear, and if it fails, the phone becomes a source of irritation: the screen goes out on its own, does not respond to approach, or vice versa, remains active during the call.

In this article, we will analyze all possible causes of malfunction of the proximity sensor on Xiaomi 11 Lite 5G NE — From software failures to hardware breakdowns, you'll learn how to diagnose a problem yourself, what settings to check first, and when you need to go to the service center. We also collected unique data on the prevalence of this malfunction among users and prepared a checklist for quick verification.

How the proximity sensor works and why it is important

Approximation sensor in Xiaomi 11 Lite 5G NE — It's an infrared sensor that sits at the top of the screen next to the front camera, and its primary function is to detect when an object is approaching the screen (like an ear while ringing) and turn off the backlight to make sure that it's not moving:

• 📵 Preventing Accidental Pressing During a Conversation
• 🔋 Save battery power
• 👁️ Protect your eyes from unnecessary light

Xiaomi 11 Lite 5G NE It uses an optical proximity sensor that works by reflecting an infrared beam, so when you hold the phone to your ear, the beam bounces off the surface and back to the sensor, signaling the system to turn off the screen. If the sensor is contaminated, damaged or blocked by a protective film, its operation is disrupted.

Interesting fact: in some cases, a malfunction of the proximity sensor may be due to problems in the firmware. MIUI Users complained massively about the spontaneous shutdown of the screen during calls, which confirms that it is not always the fault of the hardware - sometimes it is enough to reset the settings or roll back the update.

Signs of malfunction of the proximity sensor

How to know what the proximity sensor on your Xiaomi 11 Lite 5G NE Is it working wrong:

• 📱 The screen does not go out during the call, even when the phone is pressed to the ear.
• 🔦 The lighting is switched off arbitrarily, even without the approach of objects.
• 🎧 During a conversation on speakerphone, the screen suddenly goes out.
• 🔄 The sensor is triggered with a delay (for example, the screen goes out through the 5-10 seconds after approach)
• 🚫 In the phone settings, the proximity sensor is not determined at all.

One of the most obvious signs is that the screen is constantly burning while you're calling, and it's not only annoying, it's also causing the battery to run out quickly, and it's also causing the risk of accidentally pressing the buttons. Another common scenario is when the screen goes out too early, before you even have time to answer the call or complete the dial.

⚠️ Attention: If the proximity sensor stopped working after the phone fell or moisture hit, most likely, the problem is hardware. In this case, self-repair can aggravate the situation - it is better to contact the service center.

You can use the sensor test mode to get a good diagnosis, and you can start it by:

1. Open the Phone app.
2. Enter the combination ##6484## (some firmware may not work).
3. Select Proximity Sensor (Proximity Sensor).
4. Raise your hand to the top of the screen – the value should change from 5.00 (no obstacle) to 0.00 (there is an obstacle).

If the values do not change or the sensor does not respond at all, this confirms its malfunction.

Programmatic causes of malfunction and their elimination

60% of cases with proximity sensor on Xiaomi 11 Lite 5G NE It's not hardware failure, it's software failure, and these are the most common causes and ways to fix them:

The first thing to try is to reboot your phone, which is a trivial but often effective way to bring the sensor back to life, and if it doesn't work, you can take a little more serious action.

1. Cleaning the system cache: Go to Settings → Memory. → Clean. Select Deep Clean and confirm the action.
2. Resetting the settings of the Phone application: Open Settings → Annexes → Application management. Find the phone, select Warehouse and click Clear Data.

Firmware update:

• Check for updates in Settings → About Phone → System Update.
• If the problem has occurred after the update, try to roll back to the previous version via Fastboot.

If none of these methods worked, the problem may be the conflict with the installed apps. Try to start the phone in Safe Mode (press the power button). → Safe Mode, check the sensor, and if this mode is working fine, delete the newly installed programs one at a time until you find the culprit.

Clear the system cache|Reboot the phone|Check for updates MIUI|Reset the settings of the application "Phone"|Start the phone in safe mode-->

Hardware causes: what breaks down physically

If the software methods have failed, the problem is likely to be the hardware. - Xiaomi 11 Lite 5G NE The proximity sensor may fail for the following reasons:

• 💥 Mechanical damage (fall, impact, pressure on the screen)
• 💧 Moisture or condensation falling under the body
• 🔌 Oxidation of contacts on the sensor plume
• 📱 Defect of protective film or glass that blocks infrared signal
• 🔧 Poor repairs (for example, after changing the screen)

The most common hardware problem is damage to the sensor plume, which is quite thin and can break when the phone is unscrupulously disassembled or the body is bending, and another common case is contamination of the infrared window, and dust, potassium deposits, or adhesive residue from the protective film can block the signal, which makes the sensor stop "seeing" obstacles.

How to check if the sensor is blocking something:

1. Carefully inspect the top of the screen for scratches, chips, or contaminants in the front camera area.
2. If the phone has a protective film on it, try removing it and testing the sensor without it.
3. Light a flashlight at an angle to the top frame - if condensation or oxidation is visible, this is a sign of moisture getting in.

⚠️ Note: If you notice signs of corrosion or oxidation on metal parts of your phone (e.g., on the phone) SIM-In any case, do not try to clean them yourself with alcohol or wet wipes. This can aggravate the damage.

Another possible reason is that the sensor itself malfunctions, and in that case it will have to be replaced. 5G NE in service centers is about 500-1000 rubles, and the work on replacement will cost 1500-2500 rubles, depending on the region.

How to repair the proximity sensor yourself

If you're sure that the problem is not serious (for example, contamination or software failure), you can try to fix the sensor yourself. Importantly, these methods are only suitable for non-critical malfunctions.

Method 1: Cleaning the infrared window

Often the sensor stops working because of the accumulated dirt, to clean it up:

1. Turn off the phone.
2. Take a soft brush (for example, to clean the camera lenses) and gently walk along the top of the screen.
3. If the contamination is severe, use a dry microfibre wipe dipped in isopropyl alcohol (70% or higher).
4. Don’t press hard – the sensor is located under the glass and excessive pressure can damage it.

Method 2: Sensor calibration

Sometimes software calibration helps.

1. Install the Sensor Test or Phone Doctor Plus app from Google Play.
2. Run the proximity sensor test.
3. If the app offers calibration, follow the instructions on the screen.

Method 3: Checking the protective film

Many users don't realize that cheap protective films can block the infrared signal, and if you just put on a new film and then the sensor stopped working,

• Try to take it off and test the phone without it.
• If the sensor is working, replace the film with a better quality (preferably with a cutout for sensors).

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If the sensor doesn't work after cleaning, try putting the phone in a silica gel bag for a few minutes (it's included in many boxes of appliances), which will help remove condensation if the problem is moisture.

When you can not do without a service center

There are situations where self-repairing will not only not help, but can also aggravate the problem.

• 🔧 The phone fell or was subjected to severe mechanical stress.
• 💦 On the case or under the screen, traces of moisture / corrosion are visible.
• 🔌 The sensor does not respond even after resetting settings and flashing
• 📱 The screen or touchscreen is not working properly (for example, there are “dead zones")
• 🔦 Test mode shows that the sensor is completely defective (Error or Not detected)

The service center will conduct diagnostics using professional equipment, for example:

• Checking the plume for breaks or oxidation of contacts.
• Testing of the sensor with a multimeter or oscilloscope.
• Replace the sensor if it's out of order.
• Cleaning the board from oxidation (if the phone was in contact with moisture).

The cost of repair depends on the cause of the breakdown:

⚠️ Warning: If the phone is warranty, don't try to repair it yourself! Opening the case or trying to replace parts will lead to loss of warranty obligations.

Prevention: How to avoid problems with the proximity sensor

To get the proximity sensor on your Xiaomi 11 Lite 5G NE You have served as long as possible, follow these guidelines:

• 🛡️ Use high-quality covers and glass that do not block the infrared signal. Avoid cheap Chinese accessories without sensor cutouts.
• 🧼 Clean the top of the screen of dust and grease regularly. Use dry microfiber or special wipes for optics.
• 🚫 Avoid extreme temperature changes (e.g., don’t leave your phone in the cold and then bring it into a warm room.
• 🔄 Don’t update your firmware immediately after you’re out. Wait 1-2 weeks and read user reviews — often in newer versions. MIUI There are sensor bugs.
• 💧 If the phone is wet, don't turn it on right away. Place it in rice or silica gel for 24 to 48 hours to make the moisture completely evaporate.

It is also worth periodically checking the operation of the sensor using test applications, for example:

• Sensor Test – shows the values of all sensors in real time.
• Phone Doctor Plus – conducts a comprehensive diagnosis of the phone.
• CPU-Z — displays information about sensors and their status.

If you notice that the sensor is delayed or unstable, don't delay the diagnosis. The sooner you identify the problem, the easier and cheaper it will be to fix it.

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Regular cleaning of the sensor and the use of quality accessories reduce the risk of its failure by 70%.

FAQ: Frequent questions about Xiaomi’s proximity sensor 11 Lite 5G NE