How to turn on the sound on Xiaomi Redmi 9: 7 proven ways (including hidden settings)

Xiaomi Redmi 9 remains one of the most popular budget smartphones even in 2026, but owners often face the problem of sudden loss of sound. The reasons can vary from accidental press of a button to system failure. In this article, we will analyze all possible ways to recover sound from elementary to advanced, including the diagnosis of hardware malfunctions.

It's important to understand that the problem can be either software (e.g., MIUI settings are lost) or physical breakdowns (distor or connector damage). We structured the material so that you can try simple solutions first and then move on to more complex ones. If you're in a hurry, use the FAQ at the end of the article, which is the answer to the most common questions.

Before you start settings, make sure that the problem is not related to a particular application. For example, on YouTube or TikTok, the sound may be turned off due to bugs of the services themselves. Try playing audio in a standard Music app or making a test call.

1. Checking basic sound settings

Start with the obvious: maybe the sound is off at the system level. There are a few places in MIUI where this could have happened. One is the side curtain of the notifications. Swipe down from top to bottom and make sure that:

• 🔊 The volume icon will not be crossed out (if yes, touch it to turn it on).
• 📱 Do Not Disturb Mode is disabled (Crescent icon in curtain).
• 🎵 Volume slider is not in the "0" position (check all profiles: media, calls, alarm clock).

If the curtain is all right, go to Settings → Sound and vibration.

• 🔇 "No sound" should be switched off.
• 🎶 "Media Volume – Check if the settings for multimedia are broken.
• 📳 "Vibration when touching – if it works, then the problem is with the sound, not the speaker.

⚠️ Attention: Redmi 9 has a bug where, after connecting Bluetooth headphones, sound can get stuck in them even after turning off. To reset the routing of sound, restart the phone or turn off Bluetooth in the settings.

If you don't get the sound after this manipulation, move on to the next section, and if you've solved the problem, remember that 80 percent of the time, Xiaomi's loss of sound is due to random changes in volume settings or "Do Not Disturb" activation.

2.Diagnostics through the engineering menu

If the basic settings didn't work, it's time to check the hardware, and we use the Engineering Mode, which is on all Xiaomi smartphones, to test speakers, microphones and other components.

To open the engineering menu:

1. Open the Phone app.
2. Enter the combination: ##4636###.
3. Select Hardware Testing (may be called Hardware Information).
4. Go to Audio or Sound.

In this section, you will see tests for:

• 🔈 Speaker – checks the upper and lower dynamics.
• 🎧 Headset – Tests sound when wired headphones are connected.
• 🎤 Microphone – Records and plays your voice.

If you don't have sound in the speaker test, but the headphones are running, the hardware is a problem (the speaker is damaged or the plume is damaged), if there's no sound anywhere, you might have a firmware failure or an audio chip damage.

Try to connect headphones (if they have sound – the problem in the dynamics)

Restart your phone in safe mode

Reset the settings to factory (see section 5)

Contact the service center (if the warranty is valid)

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3.Resetting sound settings via ADB

If the sound is lost after a MIUI update or custom firmware installation, the problem may be in the system parameters that are lost, which can be restored through ADB (Android Debug Bridge), which requires connecting the phone to a computer, but it is effective in 90% of software failures.

You'll need:

• 💻 Computer with installed Xiaomi and ADB-tools drivers.
• 📱 Included debugging by USB on the phone (Settings) → The phone. → Version. MIUI — Press 7 times, then return to Settings → Additionally. → For developers → Debugging by USB).
• 🔌 USB-Type C Cable (preferably original).

Follow the instructions:

1. Connect the phone to your computer and confirm the debugging permission.
2. Open the command prompt (cmd) in the folder with ADB.
3. Enter the commands: adb shell su settings put global volume_music 15 settings put global volume_alarm 15 settings put global volume_notification 15 settings put global volume_system 15 settings put global volume_voice 15 reboot
4. Wait for the phone to restart.

These commands reset volume levels for all profiles. If after the reboot the sound appeared, but then disappears again - the problem may be in the application conflict (see section 4).

⚠️ Attention: Su commands require root access. If your Redmi 9 isn't rooted, skip the su string and type the rest of the commands without it. The effectiveness of the rootless method is lower, but the chance of sound recovery remains.

4. Application conflicts and safe mode

Often, the sound is lost due to third-party applications that block audio streams.

• 🔒 Antiviruses (e.g. Avast or 360 Security).
• 🎵 Equalizers (Equalizer) FX, ViPER4Android).
• 📱 Optimizers (DU Speed Booster, Clean Master).
• 🎮 Game launchers (Xiaomi Game Turbo).

To check if the app is to blame, load your phone in Safe Mode, which is only system programs, and if you hear a sound, delete the apps one by one until you find the culprit.

How to run Safe Mode on Redmi 9:

1. Press the power button before the off menu appears.
2. Press and hold the "Switch off" option (a suggestion will appear to go to safe mode).
3. Confirm the action.

In safe mode:

• 🔊 Check the sound in standard apps (Music, YouTube).
• 📞 Call your phone from another device.
• 🎧 Put the headphones on.

If the sound is working, it's a problem with third-party software. Start by removing the last apps installed. If there's no sound in safe mode, move on to resetting (section 5).

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To quickly find the “faulty” application, sort the list into Settings → Applications by installation date and delete the newest ones first.

5. Reset to factory settings

If the previous methods didn't work, you'll have to reset hard, and that will delete all the data from the phone, so first you have to:

• 📱 Make a backup copy through Settings → Additionally. → Backup and reset.
• 🔐 Remember the Mi Account (after reset, authorization will be required).
• 📎 Save important files to your computer or cloud.

The reset can be done in two ways:

Once reset, the phone will reboot to its original state. Set it up as new and check the sound. If the problem persists, it's almost guaranteed to be a hardware malfunction.

💡

Resetting to factory settings deletes all data, but returns the phone to the "clean" state of MIUI. This helps in 60% of cases of software failures of sound.

Verification of the hardware

If the sound doesn't come out even after the reset, it's time to check the hardware.

• 🔈 Lower speaker (responsible for media sound and calls).
• 🎧 3.5 mm connector (if sound is only in headphones).
• 📶 Antenna plume (can touch the audio track).
• 🔋 Audio chip (rarely encountered but irredeemable without a replacement fee).

Self-diagnosis:

1. Check the speaker for physical damage: shine a flashlight into the speaker's grille - if dust or moisture is visible, this could be the cause.
2. Test your headphones, plug in your headphones, and if you have sound in them, but you don't have it in the speaker, it's the dynamics problem.
3. Listen to the sound on the record: turn on the recorder and record the sound. If you hear distortions on the recording, but the headphones are clear, it is the microphone or audio track that is to blame.

Typical signs of hardware problems:

⚠️ Note: If your Redmi 9 has been in water (even briefly), don’t try drying it with a hair dryer or rice.Moisture from under the speaker can only be removed in a service center with an ultrasonic bath. Self-drying often leads to corrosion of contacts! If you're not sure about your abilities, you should go to the service. The average cost of sound repair on Redmi 9 in 2026: 🔧 Dynamic replacement: 500–1200 ₽. 🔌 Replacement of the connector 3.5 mm: 600-1500 ₽. 📱 Replacement of plume: 800–2000 ₽. 🔄 Diagnosis: 300-500 ₽ (Often free if you agree to repairs. 7. Alternative ways to output sound If repairs are delayed and sound is urgently needed, you can use workarounds: 🎧 Bluetooth headphones or speakers: connect any Bluetooth device through Settings → Bluetooth. The sound will be automatically displayed to it. 🔊 USB-C Redmi 9 supports digital audio via USB-Type C. Headphones from Xiaomi, Samsung or Google will fit. 📱 External speaker: connect the portable speaker via aux cable (if the 3.5mm connector is working) or via Bluetooth. 💬 Vibration and subtitles: Enable subtitles in videos and use vibration for notifications (Settings) → Special opportunities → Vibration on notifications. For calls: 📞 Use a headset with a microphone (even the cheapest one). 📱 Turn on speaker during a conversation (button in the call interface). 💬 Set up call forwarding to another number through Settings → SIM-maps and mobile networks → Call forwarding. If you often experience sound problems, consider buying an external Bluetooth transmitter (such as the Xiaomi Bluetooth Audio Receiver) that connects to your phone and transmits the sound to any headphones or speakers without delay. How to turn on mono sound for better perception when problems with the speaker B Settings → Special opportunities → Hearing, turn on the Monoaudio option, and this will combine left and right channels into one, making it easier to hear sound through a single speaker or earpiece. FAQ: Frequent questions about the sound on Xiaomi Redmi 9 🔊 Why is there no sound on Redmi 9 when you call, but the music is playing? This is a typical problem with routing sound. The reason could be: A failure in the Phone app (try resetting it to Settings). → Annexes → Phone. → Warehouse → Reset. Damage to the top speaker (responsible for spoken sound); conflict with call recording applications (remove them); If the application reset didn't help, check the speaker in the engineering menu. 🎵 How to increase the volume on Redmi 9 above the maximum? MIUI There's a hidden volume limit. To get around it: Install the Volume Booster app from Google Play. or edit the file mixer_paths.xml Root Explorer (root required).QUALIZER with pre-amplification (for example, Wavelet). ⚠️ Warning: Volume increase above standard values could damage dynamics! 📱 After updating MIUI Sound is lost. What do you do? Updates often break the sound because of: Incompatibility with custom firmware; media.server failure; magnesium module conflict (if you use Magisk); Solutions: Reverse to the previous version. MIUI Clear the cache in Recovery (Wipe Cache).Remove updates to the Google Play Services app. 🔧 Can I replace the speaker with Redmi? 9? Technically yes, but: You will need to unplug the back cover (risk of damaging the fingerprint plume). We need special tools: a suction cup, a plastic mediator, a soldering station (for the bottom speaker: ~300 ₽, But the service with a replacement will take 800-1200 ₽. If you're not a skilled repairman, you should trust the professionals to do it, and substitution errors can lead to loss of water protection or damage to the board. 🎧 Why is there sound in headphones and not in the speaker? This indicates: Lower speaker damage (most common cause); Contact oxidation on speaker plume; Route routing failure (try resetting audio settings via ADB, Diagnostics: Connect the headphones and check if the sound is working. Call the phone, if there's sound in the tube and there's no speaker, it's the bottom speaker. Check the speaker in the engineering menu.