How to turn on the sound on Xiaomi Redmi 9T: 7 working ways (2026)

You picked up your Xiaomi Redmi 9T, but the sound suddenly disappeared — music is not playing, notifications are silent, and calls have to be received in silence? This problem is familiar to many smartphone owners, and the causes can lie in both trivial settings and hardware malfunctions. In this article, we will discuss all possible ways to return sound to your Redmi 9T, from the simplest to the most advanced, taking into account the features of MIUI and the hardware platform of the device.

It is important to understand that Redmi 9T (codenamed lime) has two speakers, the main (bottom) and the conversational (top), and supports Dual Audio technology for stereo sounding. If the sound is lost in whole or in part, first check whether Do Not Disturb Mode is activated or wireless headphones are connected. Next we will look at system and hardware diagnostic methods, including hidden developer settings and hardware tests.

1. Checking basic sound settings

So, start with the obvious: maybe the sound is just software-activated or downgraded to zero, and the Redmi 9T has multiple controls at once.

🔊 Physical volume buttons are located on the left end of the device. Press the top button to turn up the volume. If the volume indicator does not appear, the problem may be deeper.
📱 Volume slider in the notification curtain - swipe your finger from top to bottom to open the Quick Settings panel, and move the slider to the right.
🎵 "No sound" mode - in the notification curtain, check whether the bell icon with the crossed speaker is activated.

If you don't have a sound after this manipulation, go to Settings → Sound and vibration.

🔕 Media Volume – a separate regulator for music and video.
📞 Call volume – can be set to a minimum.
🚫 Disabling the notification sound – the option “Silent mode” in the section Additional.

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On Redmi 9T, you can quickly switch sound profiles, holding the volume button - a menu with the options "Sound", "Vibration" and "No Sound" will appear.

Diagnostics of program failures

If the basic settings are fine but the sound is still missing, a software glitch may be the cause. On Xiaomi with MIUI firmware, this happens after updates or because of application conflicts.

Rebooting the device is a classic method that solves 30 percent of the sound problems. Press the power button, select Reboot and wait for the full power to come on. If the sound came on after the reboot, the problem was a temporary system failure.

Cleaning the cache of applications related to sound:

Go to Settings → Applications → Application Management.
Find Media, Phone and Sound Settings (could be called AudioFX).
In each of them, select the Warehouse → Clear the cache.

Resetting the sound settings will return all parameters to the factory:

Settings → System → Additional → Resetting settings → Resetting sound settings →

📊 What have you tried to do to bring back the sound?

Rebooted the phone.

Checking the volume settings.

Clearing the app cache

I've tried nothing.

3. Verification of hardware components

If software methods fail, the problem may be physical malfunctions. The Redmi 9T has two speakers and a headphone jack (3.5 mm), each requiring separate inspection.

Dynamics test:

🔈 The bottom speaker is responsible for music and system sounds. Test it by playing a YouTube video.
🗣️ Top speaker -- used for conversations. Call another phone and see if you can hear it.

Checking the headphone jack:

🎧 Connect the headphones – if there is sound in them, but not in the speakers, the problem may be in the connector switch (it “thinks” that the headphones are connected constantly).
🔍 Check the connector for dirt or mechanical damage. Clean it with a dry toothbrush or compressed air.

What to do if a liquid is in the connector?

If you get water or other liquid in the 3.5mm connector, immediately turn off the phone and leave it in a dry place for 24 to 48 hours. Don't use a hair dryer, it can damage the contacts. After drying, check the sound. If the problem persists, you need to change the connector at the service center.

Diagnostics through the engineering menu:

On the Redmi 9T, you can run a hardware test to check the performance of the speakers:

##4636##

In the menu that opens, select Phone Information → Sound Testing. If the speakers don't make sounds during the test, it confirms a hardware malfunction.

4. Hidden MIUI settings for sound

MIUI hides some audio options in the developer menu or special sections to activate them:

Initiation of the developer mode:

Go to Settings. → The phone.
Click on the MIUI version 7 times until the notification “You became a developer” appears.
Back to Settings → Additionally. → For developers.

Useful options in the developer menu:

🔊 Turn off absolute volume if the sound is too quiet or distorted.
🎛️ Sound debugging – allows you to test the speakers separately.
🔄 Resetting media settings – returns all sound parameters to factory.

Customization of sound effects:

Redmi 9T has a built-in equalizer and a sound amplifier:

Settings → Sound and vibration → Sound quality → Equalizer

Try turning off all effects or select Preset Normal if the sound is distorted.

Check the volume sliders in the notification curtain

Clear the cache of the Media and Phone applications

Activate Developer Mode and Reset Media Settings

Test the speakers through the engineering menu (#4636##)

Turn off sound effects in the "Sound Quality" section"-->

5. Conflicts with applications and updates

Sometimes the sound is lost due to conflicts with installed applications or after updating MIUI.

Safe regime:

Boot your phone in Safe Mode to disable all third-party apps:

Press the power button until the shutdown menu appears.
Hold your finger on Turn off until you are prompted to switch to Safe Mode.
Confirm and wait for the reboot.

If the sound is running in Safe Mode, the problem is in one of the installed applications: Uninstall the newly installed programs or perform a reset.

Rejection of the MIUI update:

If the sound is gone after the system update, you can roll back to the previous version (but it will delete all the data!):

Settings → About Phone → System Update → Troetics (⋮) → Select Service Pack

Download the old version of MIUI for Redmi 9T (lime code) from the official Xiaomi website and select it manually.

Reset to factory settings:

Apply an extreme measure if other methods have not worked.Be sure to back up your data through Settings → Additional → Backup before resetting.

Settings → System → Additional → Resetting settings → Erase all data

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If the sound is gone after the MIUI update, first try clearing the system cache via Recovery: turn off the phone, press Power + Volume up, select Wipe Cache Partition.

Hardware malfunctions and service repairs

If none of the software methods worked, the problem is probably hardware. Redmi 9T most often fails:

Component	Signs of malfunction	Possible causes	Decision
Down speaker	No sound in music/games, but the speaker is working	Factory marriage, mechanical damage, ingress of moisture	Replacement of dynamics (cost) ~800–1500 ₽)
Speaking speaker	The interviewer can’t hear you during the call.	Oxidation of contacts, break of the plume	Diagnostics and repairs in the service
Audio codecs (chips)	Total lack of sound, including headphones	Overheating, short circuit, unsuccessful update	Reflashing or replacing the motherboard
3.5 mm connector	The sound is only in the headphones, the speakers are silent.	Pollution, mechanical wear and tear	Cleaning or replacing the connector (~500–1000 ₽)

How to choose a service center:

🛠️ Official SC Xiaomi - warranty repair (if the phone is warranty), original spare parts.
🔧 Unofficial workshops – often cheaper, but the risk of poor quality parts.
📄 Check reviews on Yandex.Maps or 2GIS before your visit.

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Before visiting the service, take a picture of the IMEI phone (type *#06#) and save the purchase check - this will speed up the diagnostic process.

7. Prevention of sound problems

To avoid repeated sound issues on the Redmi 9T, follow these guidelines:

🚿 Avoid getting moisture, even if the phone has protection. IP53, 3.5mm connector and speakers vulnerable.
🔇 Do not use the phone at maximum volume for a long time - this leads to distortion and wear of the speakers.
🔄 Update regularly MIUI, But before installing the new version, read the reviews on the forums (for example, before installing the new version, 4PDA or MIUI Russia).
🧹 Clean the headphone jack every 2-3 months from dust and dirt.

Useful accessories for protection:

🛡️ Case with speaker protection - prevents dust from entering.
🎧 Bluetooth headphones – reduce the load on the connector 3.5 mm.
💧 Hydrophobic spray for processing connectors (for example, WD-40 Specialist Contact Cleaner).

Monitoring of the state of the speakers:

Install Speaker Test or SoundAbout from Google Play, which allows you to:

Test each speaker separately.
Check the balance of sound between the left and right channels.
Diagnose distortions at different frequencies.

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If you often listen to music through speakers, check their condition every six months using test tones (20 Hz – 20 kHz) to help you notice the degradation of sound in time.

FAQ: Frequent questions about the sound on Redmi 9T

🔊 The sound is only in the headphones, and the speakers are not?

This is a typical problem with a 3.5mm connector switch. The phone thinks the headphones are connected all the time. Try: Turn off and reconnect the headphones several times. Clean the headphone jack with alcohol and compressed air. Reset the sound settings through Settings → System → Reset. If it doesn't work, you need to change the jack.

📞 When you call, the person doesn't hear me, but I hear him?

The problem is the speaker or the microphone, check if the microphone is covered with a cover or a finger, if the voice recording is working through the voice recorder, if there is damage to the top of the phone, if the microphone is not working, you need to diagnose the service.

🔈 The sound became quiet and distorted?

Probable causes: Dynamic damage (e.g. after a fall); EQ settings (try to reset them); speaker grid contamination (clean with a soft brush); if hardware is a problem, the speaker needs to be replaced.

🔄 After updating MIUI It's gone, how do you get it back?

Try: Clear the system cache through Recovery (Power + Volume Up → Wipe Cache). Reverse to the previous version of MIUI (if there is a backup). Reset the sound settings in the developer menu. If nothing helps, contact Xiaomi with error logs.

💦 The phone got water and the sound disappeared?

Immediate Action: Turn off the phone and remove SIM-Place it in a silica gel bag for 48 hours. Don't turn it on, charge it, or shake it! After drying, check the sound. If the problem persists, professional cleaning is required.

⚠️ Note: If you notice that the sound is lost when the phone is heated (for example, during games), this may indicate problems with soldered contacts of speakers.

⚠️ Warning: Do not use metal objects (needles, paper clips) to clean the 3.5 mm connector - this can close the contacts and permanently disable the audio system.