Previous articleMissing Sound on Xiaomi Phone: A Complete Recovery Guide

The sudden disappearance of the audio signal on Xiaomi’s smartphone is one of the most annoying problems users face: You can try to answer an important call, but the speaker is silent, or when playing videos on YouTube and TikTok there is a death silence, despite the fact that the volume slider is twisted to the maximum. Often the reason lies not in the physical breakdown of the speaker, but in a software failure of the MIUI or HyperOS system, which is easy to fix without going to the service center.

Before panicking and carrying the device to the wizard, you need to make a thorough diagnosis of the software part. 90% of the time users forget about trivial settings, such as Do Not Disturb mode or disabled multimedia profile. System conflicts after updating the firmware can also cause loss of audio stream, requiring manual reboot of audio services or reset settings.

In this article, we will take a look at the algorithms for different scenarios, from the lack of sound in the headphones to the complete silence of the main speaker when incoming calls. You will learn to use hidden engineering codes to test hardware components and understand when software methods are already powerless. The critical first step is always to check the silent physical switch (if you have one on your model) and reboot the device, as this solves most temporary failures of the Android kernel.

Diagnostics and basic volume settings

The first thing to do if you lose sound on Redmi or Poco is to make sure that the problem is not caused by activated silence modes. Android divides the volume levels into several independent channels: multimedia, call, alarm and navigation. Often, the slider of media files is lowered to zero, while the volume of the call is at its maximum, which creates the illusion of a complete failure of sound.

Press one of the physical volume buttons on the side of the case. A slider will appear on the screen next to the current type of sound icon (usually a musical note or bell). Press the gear or three dots next to the slider to open the extended menu. Here you will see the individual regulators for all types of audio. Make sure that none of them are in the minimum position.

• 🔇 Check to see if Do Not Disturb (a crescent icon in the notification curtain) is activated, which blocks all beeps except the alarm clock.
• 📱 Make sure the smartphone is not connected to an external Bluetooth device (earphones or speakers) that is out of reach, as the sound may be going there.
• 🎧 Wipe the speaker and headphone jack with a dry soft brush, as the accumulation of dust and pile often physically blocks the output of the sound wave.

⚠️ Warning: If you use a protective film or case, make sure they don't cover the speaker holes.Some thick cases can shift and completely cover the sound module, creating a deaf sound effect or no sound at all.

Also worth checking is the equalizer settings. In the Settings menu → Sound and Vibration → Sound effects can be activated by a third-party equalizer or profile that cuts out certain frequencies. Try turning off all audio enhancements like Mi Sound Enhancer or Dolby Atmos to see if they are causing distortion or loss of sound.

Resolving Sound Problems When Calling

So when you have audio in the video, but you don't have it in the conversation, you have to pay attention to it, and you have a speaker that works differently than a multimedia speaker, and often the problem is with a proximity sensor that mistakenly thinks the phone is in the ear and turns off the sound or the screen, and you can also have software blocking the microphone or the speaker with the noise cancellation system.

First, check if the top end of the smartphone is covered with a cover or dirt, and the proximity sensor is located at the top of the screen, if it's contaminated, the phone may not respond properly to the ear, try turning off the power button or switching to speaker during a conversation, and if you hear the speaker in speaker mode, then the problem is the conversational speaker or its software control.

In some cases, resetting network settings helps, which also affects VoLTE and voice calling settings. → SIM-maps and mobile networks and try to switch the preferred type of network from 5G/LTE on 3G or 2G, To see if the quality of the communication and the sound will change, sometimes problems with voice codecs on networks. 4G/5G This means that the audio channel cannot be installed correctly.

• 📞 Check if there is a lock on unknown numbers, which can automatically drop calls or turn off the sound for certain contacts.
• 🌐 Turn off the VoLTE function in the settings SIM-Cards if your operator or coverage area is not stable with this standard.
• 🗣️ Wipe the talking speaker mesh with a soft bristling toothbrush, as skin fat and dust clog it faster than it seems.

Customization of multimedia sound in applications

If audio is only missing from specific applications, such as YouTube, Instagram or video players, the problem may lie in the permissions or cache of these programs. MIUI has an aggressive memory management policy that can "freeze" the background processes responsible for the audio stream in a particular application.

Go to Settings → Apps → All apps, find a problematic app (like YouTube) and select About. Here you click on Clear and select Clear Cache. If that doesn’t work, try Clear All Data, but remember that this will reset the settings inside the app (like you’ll need to log in again to your account).

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Use a third-party video player, such as VLC for Android. It has its own built-in codecs and can often play audio where the standard Xiaomi player is silent due to incompatibility of the file format.

It’s also worth checking whether the app itself is in video only mode or has the audio turned off. Some video editors or social networks have a separate audio switch for previews. Make sure that the smartphone settings for this app do not have a background activity restriction that can interrupt the audio stream when switching between windows.

Using the Engineering Menu for Testing

The most accurate way to determine whether a problem is hardware or software is through an engineering menu, which is a hidden part of the system, designed for technicians, but accessible to ordinary users, where you can force the playback of test sounds on all speakers, bypassing standard Android settings.

Open the Phone app and enter the code ##6484##. If the code is entered correctly, the CIT (Customer Information Test) menu will open. In the list of tests, find items related to sound: usually Receiver (talk speaker), Speaker (main speaker) and Headset (headphones).

⚠️ Attention: Be careful in the engineering menu. Don't change the parameters unless you know exactly what they're for. Your goal is to run tests, not reconfig).

Run the speaker test. You should hear a loud, clear sound. If there is sound in the test and there is no sound in the system, it is 100% software problem (software conflict, driver failure). If the speaker is silent or makes a crack/wheezing in the engineering test, then this is a direct sign of a physical malfunction of the speaker or plume, and the software methods will not help here.

Resetting sound settings and reconnecting devices

If simple methods don't work, a more radical approach is to reset all the settings associated with sound and connectivity, sometimes the system accumulates configuration errors Bluetooth or audio drivers that are not eliminated by a normal reboot, the first step is a complete reset of the Bluetooth settings.

Go to Settings → Bluetooth, tap the gear next to each paired device, and select “Forget the device” or “Delete.” Then turn off Bluetooth, restart the phone, and try to reconnect the device, which is especially true if the sound “goes” into non-existent headphones.

Also effective is to boot into safe mode, which will allow you to start the system with disabled third-party applications. If in safe mode sound appears, then the conflict is caused by some application you installed (for example, a third-party equalizer, recorder or cleaner). To enter safe mode, press the turn off button, and then hold your finger on the “off” button on the screen for a long time until the suggestion to go to safe mode appears.

• 🔄 Complete a full reboot by pressing the power button on 10-15 seconds before forced vibration, if a normal reset does not help.
• 📵 Turn on Flight Mode for 10 seconds, then turn it off to restart radio modules that can affect the sound of calls.
• 🔊 Make sure that special features (for the visually impaired) do not include audio-enabled features such as TalkBack.

When you need to go to the service center

There are a number of symptoms that indicate that software manipulation is useless and hardware components need to be replaced. If after resetting to the factory settings (Hard Reset) and checking in the engineering menu sound did not appear, the probability of physical damage is more than 90%.

Notice the nature of the sound. If instead of pure audio, you hear wheezing, crackling, gurgling, or static noise, it's a sign of the speaker's membrane being peeled off or moisture being ingested. Water, even in small amounts, oxidizes the speaker's contacts, and eventually leads to complete failure.

⚠️ Warning: If the phone falls or is hit, the speaker plume inside the case may have gone away.Do not try to disassemble the phone yourself if you have no experience, as you may damage the display plume or battery.

Also worth checking is the headphone jack, if it's shattered, oxidized, or if you can see greens inside, the sound may be lost because the system thinks the headphones are connected and redirects the audio stream, which requires cleaning or replacing the service jack.

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If the engineering test shows the absence of sound, and resetting the settings did not help - this is a guaranteed case for contacting the service. Self-repair of speakers in modern monoblock smartphones Xiaomi is extremely difficult and requires special equipment.