Xiaomi screen does not go out during a call: how to fix the problem once and for all

Introduction: Why this is an important issue

You're talking on the phone, you put Xiaomi to your ear, and the screen keeps glowing like a Christmas tree? It's not just annoying, it's a serious malfunction that has three critical consequences:

First, the battery discharge is accelerated in 2-3 The second is that the risk of accidentally tapping the sensor during a conversation increases to 80% — It's called out, it's on speakerphone, it's even sent messages in a pocket way. AMOLED-screens (in models such as Xiaomi) 13 Pro or Redmi Note 12) It causes pixel burnout through 6-8 months of active use.

In this article, we’ll look at all the possible causes, from the cluttered contamination of the sensor to the hidden bugs of MIUI 14, and give step-by-step instructions with visual examples. No water: only proven solutions from service engineers and user experiences from the 4PDA and Mi Community forums.

1. Approximation sensor: the main cause of the problem

And 90 percent of the time, he's the one who's to blame, the tiny infrared sensor that's next to the front camera, and his job is to detect when the phone is pressed against your ear, and turn off the screen, and if the sensor doesn't work, the system thinks you're holding the phone in front of you.

How to check the sensor without disassembling the phone?

• 🔍 Testing through the Engineering Menu: dial ##6484## → Choose Proximity Sensor. Cover the sensor with your hand, and it should change from 5.0 cm to 0.0 cm. If it doesn't, the sensor is defective.
• 📱 App-based verification: Install Phone Tester (available on Google Play) and run sensor test. Proximity should display a reaction schedule.
• 🧹 Pollution or damage: inspect the sensor area (usually left or right of the speaker) Dust, protective film or crack in the glass can block the signal.

If the sensor does not respond at all, the problem may be:

⚠️ Attention: If you use a magnet case (for example, for wireless charging), it may interfere with the sensor.

2.Firmware failures MIUI: when it's the fault of the PO

Even if the sensor is in good condition, bugs in MIUI can block it, especially for:

• 📲 MIUI 13/14 on older models (Redmi Note) 9, Mi 10T)
• 🔄 Phones after recent updates by air" (OTA)
• 🛠️ Devices with custom firmware (LineageOS, Pixel Experience)

How to diagnose a software problem:

1. Restart your phone in Safe Mode (press the power button → long tap on "Switch off" → "Reboot in Safe Mode"). If it's running the sensor, it's the third-party app's fault.
2. Check the error logs: connect the phone to the PC, enable debugging over USB and type in ADB: adb logcat | grep -i "proximity" If there are lines with ERROR - a problem in the system.

Decisions:

• 🔄 Update rollback: If the problem occurs after the update, go back to the previous version MIUI through settings → The phone. → Updating the system → Three points. → Select a Service Package.
• 🧹 Cache Clearing: Go to Settings → Annexes → Application management → Three points. → Show system-based → Phone. → clear the cache and data.
• 🛠️ Flashing: If nothing helps, run your phone through the Mi Flash Tool (instruction below).

3. Phone Settings: What You May Have Missed

Sometimes the problem is incorrect settings that the user does not even suspect.

• 📞 In your pocket mode: go to Settings → Display. → In your pocket mode and turn it off. This feature may conflict with the proximity sensor.
• 🔦 Lighting at notifications: in Settings → Notifications → Illuminate the screen disable the option "Light up the screen when an incoming call".
• 🎵 Loud communication by default: if you have the option "Always use speaker" enabled (Settings) → Sound. → Loud communication, the screen may not go out.
• 🔄 Autoturn: In rare cases, orientation sensor interferes with the approach sensor. Try turning off autoturn in the notification curtain.

It is also worth checking the settings of special features:

1. Open Settings → Special Options → Physical buttons.
2. Make sure the “Finish the Power button” option is turned off – it can interfere with the normal operation of the sensor.
3. Check the Gestures section – some gestures (such as “Raise to wake up”) conflict with the proximity sensor.

Check the speakerphone settings

Turn off the lighting at notifications

Make sure the turn is off.

Checking out special facilities-->

Mechanical damage: when the sensor is not to blame

If the sensor is in good condition and the problem persists, the cause may be physical damage to other components:

• 🔌 Display plume gone: even a microcrack in the plume can interrupt the signal from the sensor to the motherboard.
• 🔋 Bloated battery: presses the motherboard and disrupts the contacts. Check that if the back of the phone is raised, the battery is definitely swelling.
• 📶 Damaged screen module: after replacing the display, the wizard sometimes forgets to connect the proximity sensor plume (it goes separately from the touchscreen!).

How to diagnose:

1. Light a flashlight on the screen at an angle – if you see rainbow spots (especially in the sensor area), this is a sign of detachment of the polarizing layer.
2. Press lightly on the top of the screen (near the speaker), and if the screen starts to blink or go out, the plume is to blame.
3. Check if the phone is warming up in the camera area during the call, and overheating may indicate a short circuit.

⚠️ Attention: If you've dropped your phone recently, even from a low altitude, you might have left the gyroscope or the accelerometer, and these sensors are located next to the proximity sensor, and sometimes they affect the operation of the sensor!

5. Application conflict: who prevents the sensor from working

Some applications can block the proximity sensor signal or intercept the screen control, most often the fault is:

• 📞 Alternative calls: Truecaller, Drupe, ExDialer. They have their own screen control algorithms.
• 🔒 Applications for blocking: AppLock, Norton App Lock – may conflict with system services.
• 🎮 Game utilities: Game Turbo (built-in) MIUI) or GFX Tools sometimes freeze sensors for stability FPS.
• 🛡️ Antiviruses: Avast, Kaspersky scan sensor activity and can block them.

How to find the culprit:

1. Launch your phone in Safe Mode (instruction above) If the problem is gone, it's the third-party app's fault.
2. Remove applications from the list above, checking the sensor after each deletion.
3. Use ADB to monitor activity: adb shell dumpsys power | grep "mProximitySensorWakeLock" If the output has lines with ACQUIRED, then some application holds the sensor.

If you don’t want to remove apps, try:

• Disable the permission to "Change system settings" (Settings → Applications → Permissions).
• Add them to Battery Optimization (Settings → Battery → Battery Optimization).
• Update applications to the latest versions – new releases often fix bugs with sensors.

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If the problem occurs after installing the shell (such as a Nova Launcher or Smart Launcher), return the standard MIUI launcher.

6. Hardware repair: when nothing helps

If all the previous methods didn't work, then you have hardware intervention.

• 🔧 Replacement of the proximity sensor: the cost of the part - from 300 before 800₽, job — 1000-1500₽. On Xiaomi models 12T And the newer sensor is often assembled with the front camera.
• 🔌 Plug-up of the plume: if the problem is in the contacts, the master can solder the plume without replacing the sensor (price - from 800)₽).
• 📱 Replacement of the display module: if the screen itself or its plume is damaged, a complete replacement (from 3000) will be required.₽ Redmi up to 10,000₽ Xiaomi 13 Ultra).

How to choose a service center:

⚠️ Note: If you are offered a "analogue" sensor for 200₽, Know that these parts are often uncalibrated and will work over and over again.

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Before repairing, make sure to back up your data via Settings → About Phone → Backup. When replacing the plume or screen, there is a risk of losing information!

FAQ: Frequent questions about screen issue during call