The sound on the Xiaomi phone itself is added: causes and solutions

You watch a video at a low volume, but suddenly Xiaomi's phone spontaneously increases the sound to a maximum? Or during a conversation, the volume of the speaker jumps without your participation? This problem occurs on models Redmi Note 10/11/12, Poco X3/X4, Mi 11/12 and other devices running MIUI 12-14. Most often the fault of software failures, but sometimes the root of the evil lies in hardware problems.

In this article, we'll look at all the possible causes, from trivial settings to hidden firmware bugs, and give you step-by-step instructions to fix the problem. We'll focus on unique MIUI solutions that aren't in standard manuals. If after reading the sound continues to "live its life" - you'll know whether to carry the phone to the service or you can handle it yourself.

1. Check the basic sound settings

Start with the obvious: the problem may be with standard MIUI settings. Often users accidentally activate features that automatically adjust volume.

Open the Settings → Sound and vibration and check:

• 🔊 Adaptive sound — if it's on, turn it off. This feature analyzes ambient noise and can change volume unpredictably.
• 🎧 Amplification of sound in headphones – sometimes works even without connected accessories.
• 📱 Do Not Disturb – Make sure it doesn’t conflict with volume settings.

Also, look at Settings → Special Features → Hearing. This can activate the Sound Control option, which allows gestures to adjust volume — it’s best to turn it off if you’re not using this feature.

2. Reset the sound settings to factory

If the basics didn't work, try resetting only the audio settings without affecting other data, which often resolves the problem after MIUI updates.

Instructions:

1. Go to Settings → System and device → Resetting.
2. Select "Resetting Sound Settings" (not to be confused with a full reset!).
3. Confirm the action and restart the phone.

After the reboot, check if the problem persists. If so, move on to the next step.

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Before reset, write down the current volume settings for calls, media and alarm clocks, and after the procedure, you will have to reset them.

3. Update or reinstall MIUI

Sound bugs often appear after firmware updates or because of corrupted system files. If your Xiaomi is running MIUI 12-14, try:

• 🔄 Update to the latest version through Settings → The phone. → Updating the system.
• 🛠️ Reinstall the current firmware (without data loss) via Settings → The phone. → Updating the system → Threefold (⋮) → Select a Service Package.
• 📦 Install firmware manually via the Mi Flash Tool (requires an unlocked bootloader).

For manual installation, download the official firmware for your model from the Xiaomi Firmware website. Choose the version of "Recovery" (for installation via stock recovery) or "Fastboot" (for Mi Flash Tool).

Download the correct version of the firmware for your model

Check the battery (minimum 50%)

Backup of important data

Disable the boot loader lock (if required)

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4. Check your phone for viruses and malware

Some applications (especially from third-party sources) can change system settings, including volume, without any control.

• 🎮 Cheats for games (for example, for PUBG Mobile or Free Fire).
• 📱 Launchers and Thems from Third-Party Developers.
• 🔊 Apps for sound amplification (such as Volume Booster).

How to check:

1. Install Malwarebytes or Dr.Web Light from Google Play and scan the system.
2. Run Safe Mode (press the off button → long tap on "Stop" → "Safe Mode"). If the problem disappears, the third-party application is to blame.
3. Check for special features in Settings → Special features → Installed services. Turn off suspicious ones.

5. Diagnostics of hardware problems

If the software methods fail, the problem may lie in physical malfunctions:

• 🔌 Damaged volume button plume – even if the buttons are working, microcracks can cause false positives.
• 💧 Oxidation of contacts after moisture hits (even if the phone hasn't sunk, humidity in the air can affect the condition).
• 🔋 Faulty audio codec – the chip responsible for sound processing.

How to check:

1. Blow the volume buttons with compressed air (a tank for cleaning equipment), sometimes dust accumulates between the button and the case.
2. Check the response to pressing: if the sound changes with a light touch of the buttons, the problem is mechanical.
3. If the volume is good in them and the speakers aren't, it's the audio track.

⚠️ Warning: If the phone falls or gets wet, don’t try to disassemble it yourself – Xiaomi uses adhesive tapes and fragile plumes".

6. Alternative solutions for experienced users

If standard methods don’t help, try advanced methods (require root rights or unlocked bootloader):

• 🛠️ Removal audio_effects.conf — It requires root rights and a file manager (like Root Explorer: /system/vendor/etc/audio_effects.conf.
• 🔧 Reverse to the old version MIUI via Fastboot if the problem has occurred after the update.
• 📱 Installation of a custom core (e.g., FrancoKernel) that can fix bugs with sound.

For removal audio_effects.conf:

1. Get root rights (for example, through Magisk).


2 Download Root Explorer from Google Play.




3. Go to /system/vendor/etc/.




4 Find the file audio_effects.conf and rename it audio_effects.conf.bak.




5. Reboot the phone.

⚠️ Note: Deleting or changing system files without a backup can lead to a phone bric (complete failure.

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If the problem occurred after the MIUI update, try to roll back to the previous firmware version. Often, sound bugs are fixed in the next patches, but rollback is the fastest way to get back to work.

7.When to contact the service center

If you've tried all the methods, but the sound on Xiaomi is still adding itself, most likely it's a hardware malfunction.

• 🔊 The problem is even in safe mode.
• 🛠️ The phone fell, wet or overheated.
• 🔋 After the firmware, the problem did not disappear, but worsened.
• 📱 Artifacts appear on the screen or the phone spontaneously reboots.

The cost of repair in official Xiaomi services:

Before the service visit:

1. Make a full backup of your data (via Mi Cloud or Google Account).
2. Write down the phone's IMEI (type *#06#).
3. Check whether the warranty is maintained (if the phone is on the warranty, do not disassemble it yourself!).

FAQ: Frequent questions about spontaneously increasing sound