The situation when the speaker of the phone is not audible to the interlocutor, familiar to many owners of smartphones Xiaomi, Redmi and POCO. This is not just a temporary inconvenience, but a problem that can seriously disrupt the course of an important conversation or business meeting. Often users think that it is a fault of the hardware, and rush to carry the device to the service center, although in most cases the cause can be eliminated by yourself in a few minutes.
In this article, we will explore in detail all possible causes of quiet sound in a conversational speaker, from banal grid contamination to software failures in the MIUI shell. You will learn how to correctly diagnose a problem, what settings can drown out the voice of the interlocutor and when it is time to sound the alarm. In 80% of cases, a quiet sound is caused by contamination of the protective mesh of the conversational speaker with earwax or dust.
Before you start to do complex manipulations, it's important to understand that the volume reduction can be caused by both software and hardware factors. Sometimes it's enough to just restart the device or turn off the noise cancellation function to make a difference. Let's look at the basic steps to fix the malfunction.
Diagnostics and primary sound testing
The first thing you need to do is to determine the nature of the malfunction. The voice of the interlocutor is quiet all the time or only in certain applications? Are there interference, crackling or hissing? For accurate diagnosis in Xiaomi smartphones, there is a hidden engineering menu that allows you to check the operation of all speakers regardless of the operating system.
To enter the test mode, open the Phone app and dial the combination ##6484##. In the CIT menu that opens, find the item associated with Receiver or Earpiece. Run the test: you should hear a loud signal or voice. If the test sound is clear and loud, then everything is fine with the hardware and the problem is in the settings or the software.
Even if the engineering menu barely hears the sound, it is a direct sign of hardware problems or severe contamination, and it is also worth checking whether the In-Pack mode or third-party equalizer applications that can intercept audio control are activated.
⚠️ Note: If the sound in the engineering test remains quiet after resetting the settings to the factory (Hard Reset), this indicates a physical malfunction of the speaker or plume module, which requires replacing the component.
Cleaning the conversational dynamics from pollution
The most common reason why the speaker of the phone is not audible to the interlocutor on Xiaomi is a banal clogging. The protective mesh located at the top of the screen, over time, gets clogged with skin fat, dust, pile from pockets and earwax, which "congestion" physically blocks the output of the sound wave.
Sharp objects such as needles or pins should not be used to clean, as they will pierce the speaker membrane, resulting in complete loss of sound, and it is also not recommended to use high-pressure compressed air, which can drive the dust even deeper or damage the internal mounts.
The optimal cleaning method involves using a soft toothbrush with dry bristles or a special cleaning liquid for electronics (isopropyl alcohol). Apply a small amount of the product on the brush, slightly shake off the surplus and walk gently through the speaker grid in circular motions. Let the moisture dry completely before turning on the device.
☑️ Checklist for cleaning the speaker
After the cleaning procedure, the volume should be restored, and if this did not happen, it may have penetrated deep into the case, and it will require disassembly of the device for more thorough ultrasound treatment at the service center.
Sound settings and MIUI function
The MIUI and HyperOS shells offer a variety of features to improve sound, but sometimes they don't work correctly or conflict with each other. First, check the standard volume settings. Press the side volume button while you talk and make sure the Call slider is twisted to the maximum.
Next, you should pay attention to the Sound Improvement feature. Go to Settings → Sound and Vibration → Sound Quality (the path may vary depending on the OS version). Try turning off all enhancements like Mi Sound or equalizer to eliminate their impact. Sometimes activating Mono Mode in special features also changes the nature of the sound, making it flatter and quieter.
- 🔊 Check if Quiet or Do Not Disturb mode is enabled, which can limit the volume of the call.
- 📵 Make sure Bluetooth is turned off, otherwise the sound may be transmitted to a wireless device forgotten in the bag.
- 🎧 Disable any third-party apps to amplify bass or surround sound.
It’s also worth checking the settings of the specific app you’re communicating through (WhatsApp, Telegram, Viber) and these apps often have their own volume sliders or communication quality settings that can be set to a minimum to save traffic.
Secret codes for sound checks
Influence of covers and protective glasses
Often, new smartphone owners do not notice that the problem lies in the external accessory. Poor quality protective glass or improperly selected cases can block the opening of the speaker, even a small shift of glass by 1-2 millimeters can reduce the volume by 50%.
Remove the cover and the safety glass, and then make a second test call. If the sound becomes loud and clear, the problem is solved. In the case of protective glasses, it is recommended to replace them with original or certified accessories that have special cutouts for the speaker.
In addition, some thick covers create a “well” effect, distorting the sound and creating an echo that the noise reduction system perceives as a hindrance and begins to “press” the voice of the interlocutor, making it even quieter.
⚠️ Attention: Using magnetic car holders in the upper speaker area can create magnetic interference that affects sound quality.
Software failures and system updates
Software bugs in firmware are another common cause of silent sound. After updating MIUI, audio codec drivers may be lost or cache conflicts arise. If the speaker of the Xiaomi phone is not able to hear the interlocutor after the update, try resetting the audio settings.
To do this, go to Settings → Advanced Settings → Recovery and Reset. Note that a full reset will delete all data, so back up first. Sometimes a gentler method helps: clearing the cache through the recovery menu or a safe mode that disables all third-party applications.
Check for system updates. Xiaomi engineers regularly release patches that fix audio bugs. If you’re using a global firmware version, you might want to consider switching to a stable version for your region, as Chinese firmware (CN) sometimes has differences in the noise reduction algorithms.
| Reason. | Symptoms. | Method of decision |
|---|---|---|
| Grid contamination | The sound is deaf, hissing. | Brush and alcohol cleaning |
| Cover/Glass | The sound became quiet abruptly after buying the accessory | Remove the accessory or replace |
| Failure of the | The sound disappeared after the update | Resetting or flashing |
| The plume malfunction | The sound, that is, no, depends on the position. | Replacement of a plume in the service |
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Useful advice: Before going to the service center take a photo IMEI-code (on the box or in the settings) and take a screenshot of the purchase check, which will speed up the warranty case if the problem turns out to be factory-made.
Hardware malfunctions and repairs
If software and cleaning methods didn’t work, it’s likely a physical breakdown. In Xiaomi smartphones, the speaker is often integrated into a plume that connects the main board to the top of the body (where the front camera and proximity sensor are located), and when it falls, this plume could move away or damage.
The speaker itself can also fail, and over time, the membrane material will tan or tear, resulting in a quiet, hoarse sound or no sound, and only a replacement component will help. The cost of a conversational speaker for Redmi Note or POCO models is usually low, but the job of replacing it requires skill.
Another hidden problem is the oxidation of the contacts on the motherboard due to moisture, and even if the phone did not sink, high humidity in the bathroom or outside could cause microscopic corrosion, which disrupts the signal transmission to the speaker.
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If the phone falls into water, do not try to dry it with a hair dryer or on a battery - high temperatures will melt the glue and damage the screen. Use silica gel or carry it to the service for ultrasonic cleaning.