The situation when It is difficult to hear the interlocutor during a telephone conversation, which is one of the most annoying problems for smartphone owners Xiaomi. Users often encounter the fact that even with the volume turned up to maximum, the opponent’s voice sounds quiet, unintelligible, or disappears in the noise. This can be caused by software failures, clogged earpiece speakers, or individual characteristics of the shell MIUI and HyperOS.
Solving the problem requires an integrated approach: from simply cleaning the speaker mesh to changing hidden system parameters through the engineering menu. In this article we will look at all the legal and safe ways to increase the sound level available to owners of devices based on Android. We will analyze both standard system settings and advanced methods for experienced users.
Before taking radical measures, such as resetting settings or flashing the firmware, it is necessary to exclude trivial physical causes of quiet sound. Often the problem lies not in the software, but in simple contamination or incorrect positioning of the smartphone during a call.
Physical cleaning and checking accessories
The most common reason for a quiet speaker is a clogged protective mesh. Dust, lint from pockets and sebum over time form a dense layer that physically blocks the passage of sound waves. Owners Redmi i POCO You should regularly inspect the top of the screen where the speaker slot is located.
For cleaning, use a soft toothbrush with bristles no higher than medium hardness or a special adhesive tape for cleaning equipment. It is strictly forbidden to use sharp objects such as needles or toothpicks, as they can easily pierce the speaker membrane or damage the moisture-proof coating. Gentle circular movements with the brush will help remove visible dirt.
It is also worth checking whether the protective glass or case is interfering with the sound. Some glass models have a frame that is too thick or an incorrectly cut slot, which blocks the sound output. Try removing the case and making a test call. If the volume is restored, the problem is solved by replacing the accessory.
- 🧹 Use a dry soft brush to remove dust from the speaker grill.
- 📱 Remove the protective case during the call to check the effect of the accessory.
- 💨 Blow the speaker grill with a compressed with air (a can), holding it at a distance of 5-10 cm.
- 🚫 Do not use alcohol or water directly on the mesh so as not to damage the adhesive layer.
⚠️ Attention: Never try to clean the speaker with a needle under high magnification without experience. The risk of damaging the thin membrane inside the case is extremely high, which will lead to complete failure of the speaker and the need for an expensive replacement.
☑️ Diagnosis of the physical condition
Configuring standard sound parameters in MIUI
Shell MIUI provides advanced audio controls that are often ignored by users by default. First of all, you need to make sure that the media and call volume slider is not the only limiter. During a call, press the volume up button and make sure that it is the “Call Volume” scale that is being adjusted, and not the media or alarm clock.
Modern firmware versions have introduced the “Sound Enhancement” function or an equalizer that can affect voice frequencies. Go to the section Settings → Sound and vibration → Sound quality and effects. Here you can try disabling various Dolby Atmos or Mi Sound effects if they distort your voice, or vice versa, activate them to enhance speech clarity. Sometimes the standard sound profile is too “flat” for the human voice.
Special attention should be paid to the “Speakerphone” mode. If the sound is quiet in normal mode, try switching to speakerphone. If the sound there is normal, the problem is localized precisely in the main conversational dynamics. If it’s quiet everywhere, it might be the codec or network settings.
Try quickly pressing the volume up button several times during a call. Sometimes the system gets stuck at an intermediate value, and a hard switch helps reset the software limiter.
Also check for system updates. Engineers Xiaomi regularly release patches that correct sound control errors. Go to Settings → About phone and click on the system version to check for updates. The new firmware version may contain fixes for audio codec drivers.
Using the engineering menu for calibration
The most effective method of increasing the volume is to use the hidden engineering menu Android. This tool allows you to directly control the speaker's signal gain at the hardware level. To enter the menu on devices with processors MediaTek and some Snapdragon use a special code in the "Phone" application.
Enter the code ##3646633## or ##4636## in the dialer. If the code is correct, a menu Engineer Modewill open. Go to the tab Hardware Testing, then select Audio and further Audio Debug. Here you are interested in the section Speech (Conversation) or Normal Mode (Normal mode).
Inside you will see the gain levels (Level 0-6). Level 0 is usually the minimum volume, and level 6 is the maximum volume. Select level 4, 5 or 6 and enter the higher number in the Value field. The standard value is often 128-160. You can try increasing it to 200 or 240, but do not exceed the maximum scale value (usually 255) so as not to burn the speaker.
Path in the engineering menu:
Hardware Testing → Audio → Audio Debug → Speech → Normal Mode → Level 4-6 → Set
After changing the value, be sure to press the button Setto save the parameters. Without clicking this button, changes will not be applied. Test the call immediately after the change. If the sound becomes too loud and wheezing appears, return the value one step back.
What to do if the code does not work?
On new versions of Android and in some regions, the engineering menu code may be blocked by the operator or manufacturer. In this case, you can try installing the "MTK Engineering Mode" application from Google Play, but it only works on MediaTek processors. For Snapdragon, methods may differ and often require root access.
⚠️ Attention: Changing parameters in the engineering menu is at your own risk. Setting the gain too high can cause permanent damage to the speaker by overloading the coil. Write down the original values before changing so that you can rollback.
The engineering menu allows you to raise the volume above the system's software limits, but requires caution. The optimal gain value is selected experimentally for each specific model.
Third-party applications for sound amplification
If fiddling with the engineering menu seems too complicated or dangerous, you can use applications from the store Google Play. There are many utilities, such as Volume Booster GOODEV or Super Soundthat programmatically amplify the output signal. They work as an intermediary between the system and the speaker, adding gain.
The principle of operation of such applications is simple: you install the booster, select the sound type (for example, “Voice” or “System Sound”) and move the gain slider. It is recommended not to exceed the 20-30% gain mark. Exceeding this threshold is almost guaranteed to result in severe distortion (wheezing) and can overheat the component.
It is worth considering that such applications consume additional battery power and processor resources, since they process sound in real time. In addition, on some models Xiaomi with strict optimization of background processes, the system can automatically close the booster during a call to save energy. In this case, you need to add the application to the battery exceptions.
- 📲 Download the proven Volume Booster application from the official store.
- 🎚️ Set the boost to no more than 20% to start testing.
- 🔋 Add the application to startup and disable energy saving for it.
- 🔊 Use a booster only when absolutely necessary, and not constantly.
Remember that third-party boosters cannot fix physical damage to the speaker. If the membrane is damaged or the cable contact has come loose, software amplification will only make the wheezing louder, but will not restore the purity of the sound. Use this method as a temporary solution.
The influence of the network and telecom operator on the volume
Sometimes the problem of a quiet voice lies not in the smartphone, but in the quality of the cellular connection. When the signal is poor, the network automatically switches the codec to a lower bitrate, which makes the voice quiet and robotic. This is especially true in buildings with thick walls or in areas of poor reception.
Try manually switching the network type. If you're in a 4G/LTE area but the signal is weak, your phone may frequently jump between standards, causing interruptions and a drop in volume. In the settings Settings → SIM cards and mobile networks → Preferred network type you can select forced 3G (preferred) or 2G for the test. In some cases, stable 3G gives louder and clearer sound than unstable 4G.
It is also worth checking the function VoLTE (Voice over LTE). On some tariffs and some operators this function is implemented incorrectly, resulting in low sound. Try disabling VoLTE in the SIM card settings and make a call over a regular voice network. If the volume increases, the problem is on the side of the telecom operator.
| Parameter | Impact on volume | Recommendation |
|---|---|---|
| Signal level | At 1-2 divisions, sound quieter | Move to the area of better reception |
| Communication codec (HD Voice) | Makes the sound clearer and louder | Enable VoLTE, if supported |
| Network type (2G/3G/4G) | 2G often gives the loudest, but mono sound | Switch manually if 4G is bad |
| Noise reduction | Can “cut” the voice along with the noise | Check settings in the call menu |
Please note that network settings may vary depending on the region and specific operator. What works for one subscriber may not work for another. Experiment with settings in different locations.
⚠️ Attention: Disabling 4G/LTE will reduce the mobile data speed to a minimum during a call or at all. Use this method only to diagnose a sound problem, do not leave the phone in 2G/3G mode all the time if fast Internet is important to you.
When hardware repair is required
If neither software settings, nor cleaning, nor the engineering menu helped, most likely the problem is hardware in nature. Over time, the speaker wears out: the magnet weakens, the coil becomes deformed, or the contacts on the board oxidize. This is a natural process of aging equipment.
Symptoms of hardware failure are not only a quiet sound, but also the appearance of extraneous noise, crackling, body vibration during a call, or a complete absence of sound when notifications are running. It is also worth checking whether the phone has been dropped into water. Even short-term exposure to moisture can cause corrosion of the speaker contacts, which manifests itself over time.
In the event of a hardware failure, the only solution is to replace the speaker. This procedure in service centers is usually inexpensive and takes about 30-60 minutes. For popular models Xiaomi spare parts are always in stock. Independent replacement is possible, but requires skills in working with small electronics and the availability of tools (hair dryer, suction cups, screwdrivers).
Before going to the service, make a control call from another phone to your Xiaomi and record the conversation on the voice recorder of the second device. This will be evidence of a quiet sound for the technician, since the service center can be noisy.
Do not delay repairs if you notice a problem. Operating a phone with a faulty speaker at a higher volume (if you try to compensate for this with settings) can damage adjacent components on the board due to excessive vibration or overheating.
Is it possible to increase the volume permanently without losing quality?
It is difficult to completely “permanently” increase the volume without the risk of loss of quality. Software amplification always introduces distortion. The best way to maintain balance is by cleaning your speaker regularly and using quality accessories. The engineering menu gives the best result, but is reset after a full reset (Hard Reset).
Why did the sound become quieter after the MIUI update?
Developers often change noise reduction algorithms and volume limiters in new firmware versions for the sake of hearing safety or to meet the standards of a particular country. Sometimes this is a bug that is fixed in the next patch.
Does the protective glass affect the volume?
Yes, it does. If the glass is glued crookedly or has a thick frame at the top, it may block the sound guides of the speaker. Try removing the glass to check.
Are booster apps safe to use?
Short-term use is safe. However, constant operation of the speaker at maximum power with software amplification shortens its service life and can lead to winding burnout.
What should I do if the other person can’t hear me, but I can hear him?
This is a problem with the microphone, not the speaker. Try cleaning the microphone hole (usually at the bottom of the case) or checking the permissions for the Phone application in the privacy settings.