The situation of having little or no voice during an important call is familiar to many smartphone owners. The quiet sound of a speaker can be a serious problem, especially in noisy places or for people with hearing impairments. Fortunately, the Android operating system and the MIUI or HyperOS shell provide enough tools to solve this problem without having to carry the device into service.
Before we go to radical methods, we should rule out the trivial reasons for the volume down. Often the problem lies in the contamination of the speaker grid or incorrect settings of the software, which are easily adjusted by the user. In this article, we will examine all the available methods, from basic checks to the use of hidden engineering menus.
Increasing the volume of the speaker on Xiaomi requires a comprehensive approach. We will consider both software methods and physical aspects that affect the quality of sound transmission. It is important to act consistently so as not to disrupt the audio codec or damage the hardware of the device.
Basic test and cleaning of speakers
The first step is always to do physical diagnostics, and when you use the grid of the speaker at the top of the screen, you inevitably get dust, pile and skin fat, and these pollutants act like a cork, and they significantly reduce the sound pressure.
To clean, use a soft dry toothbrush or a special sticky tape. Do not try to blow out dust with your mouth - moist air only compresses dirt deeper into the membrane. Careful brushing will help extract visible debris particles.
⚠️ Warning: Do not use sharp objects such as needles or pins to pick through the speaker grid.You risk piercing the protective membrane or damaging the speaker itself, resulting in complete loss of sound.
It's also worth checking if there's a protective film or glass with a hole in the wrong way under the speaker, sometimes even a small projection of the film blocks the output of the sound wave, remove the protective coating and check if the volume changes.
Make sure there is no garbage in the charging jack or headphone jack. Xiaomi smartphones often have a smart logic of operation: if oxidation is detected in the connector, or the system can force volume limit or redirect sound thinking that the headset is connected.
Volume setting in the standard menu
Many users forget that in Android there is a volume division for different multimedia profiles. The volume of the ringtone, alarm and system sounds is adjusted separately from the volume during a conversation. To set up a conversation speaker, you need to call the settings menu directly during the call.
Call someone or a support number (e.g. 112 or 113). When the connection is established, press the volume button on the side of the face. A slider marked with the phone handset icon will appear on the screen, which is the parameter responsible for the strength of the interlocutor's sound.
Once the slider is adjusted during the call, the system will retain this value as the maximum for future conversations, but if the standard maximum is still not enough, you will need to delve into the settings of the sound profiles.
Go to Settings → Sound and Vibration → Sound Customization (or Equator) and try to select a Loud or Bright profile if it is available for your model. While this mainly affects multimedia, in some versions of MIUI, it also changes the overall audio gain curve.
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Use active noise-canceling headphones to make calls in noisy places, which will allow you to hear the interlocutor clearly even at medium volume, without straining the hearing and speaker of the smartphone.
Use of the Engineering Menu for Calibration
The most effective, but careful way is to access the engineering menu, which is a hidden part of the system, designed for testing equipment by the plant's engineers, where you can manually change the levels (amplifications) for different frequencies and modes of operation of the speaker.
To enter the menu, open the Phone app and type the combination ##3646633##. If the standard code doesn’t work (which is often the case in global firmware versions), try installing the Engineer Mode app. MTK from the Play Market or use it ADB-activation.
From the menu that opens, go to the Hardware Testing tab, then select Audio. Next, you need to find the Audio Debugging or Speech Enhancement section. Depending on the processor (MediaTek or Snapdragon), the interface may differ, but the logic remains similar.
You need to find the setting for Normal Mode (normal mode) and Speech subcategory (conversation) and the volume levels (Level 0-6) and you increase the values in the Digital Gain or Volume Step fields, you increase the maximum volume.
Risks of changing engineering settings
After making changes, be sure to press Set or Apply to save settings. Reboot the device and check the result in a real call. If the sound gets too loud and distortion appears, return the values to the original ones.
Activation of Dolby Atmos and Sound Effects
Modern Xiaomi smartphones are often equipped with software modules to improve sound, such as Dolby Atmos or branded sound effects MIUI Sound. These technologies can significantly affect speech intelligibility and perceived loudness.
Find the section Sound and vibration in the settings → Sound effects. Turn on the Dolby Atmos switch. Select "Auto" or "Voice" in your profile. Dolby algorithms often raise quiet frequencies, making the speaker's speech more distinct without extreme decibel increases.
Also, pay attention to the equalizer. To improve speech intelligibility, it is recommended to raise the frequencies slightly in the range of 1 kHz - 4 kHz. It is in this spectrum that the main energy of human speech lies. Raising low frequencies (bass) can, on the contrary, make the sound "poor" and less loud.
| Parameter | Recommended value | Impact on sound |
|---|---|---|
| Basses (60Hz) | 0 dB or -1 dB | Remove the humming, frees up space for voice |
| Medium (1 kHz) | +2 dB | Increases clarity of the main mass of the voice |
| High (4 kHz) | +3 db | Adds legibility to consonant sounds |
| Ultra-high (16 kHz) | 0 dB | It doesn't affect speech, just hissing. |
Some models allow you to activate the voice enhancement function in the special features section, and this filter uses AI to highlight the human frequency range and suppress background noise, which subjectively makes the sound louder.
Check Bluetooth settings and headsets
Sometimes the problem with quiet sound isn't the phone itself, but rather the conflict with connected Bluetooth devices. If your smartphone was previously paired with a headset, smartwatch, or speaker, the system could have kept a low-volume profile.
Go to Settings → Bluetooth. Find previously connected devices in the list, click on the gear icon next to them and select "Disable" or "Forget device." This will reset potentially erroneous volume profiles.
☑️ Diagnostics of Bluetooth conflicts
It’s also worth checking if the Hearing aid mode or other accessibility features that can redistribute audio stream are activated. In rare cases, a full reset of network settings helps: Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth.
If you use wireless headphones, make sure that their volume is synchronized with the volume of the phone. TWS-headphones have an independent adjustment, which must be twisted to the maximum separately from the smartphone.
Third-party applications for sound amplification
If you don’t have enough system tools, you can use third-party software from Google Play. Amplifiers such as the Volume Booster GOODEV or Super Volume Booster allow you to exceed the standard volume limits set by the manufacturer.
The principle of their operation is to programmatically amplify the digital signal before it is sent to the DAC (digital-to-analog converter), which can give a volume increase of up to 60% or more.
⚠️ Warning: Prolonged use of amplifiers at maximum power can cause the speaker to overheat and burn out. Use such applications only as a matter of urgency and do not keep the gain level at maximum all the time.
When installing such an application, be sure to give it the necessary permissions to change system settings. In the settings of the booster itself, select the "Boost Speaker" or "Phone Call" mode. Some applications require root rights for deep integration, but they also work in normal mode.
Alternatively, call apps with recording and amplification feature that intercept audio streams and play them with increased gain. However, in modern versions of Android (10 and above), access to audio streams during a call is severely limited by Google's security policies.
Hardware diagnostics and maintenance
If neither software nor cleaning has worked, there's a high probability of hardware failure. A conversational speaker is a consumable that degrades over time. A membrane can stretch, a magnet can demagnetize, or a plume can move away from contact.
Run the test in the engineering menu: Hardware Testing → Audio → Playback. Select Receiver mode and run the test. If you hear wheezing, crackling, or sound interrupted, chances are the speaker is physically damaged.
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Replacing the speaker is an inexpensive and quick procedure in an authorized service. Do not try to solder it yourself without experience, as the plumes in modern Xiaomi are very thin and easily break.
It is also worth checking the plume connecting the board to the top of the case (where the speaker and front camera are often located), which can move away when falling. Careful reconnection of the plume (if you have disassembly skills) sometimes returns sound.
In cases where the sound is completely lost or becomes extremely quiet immediately after moisture hits, you need to immediately turn off the phone and not charge it. Trying to dry the hairdryer can drive the water deeper, and only professional cleaning in the ultrasonic bath in the service center will help.
Timely referral to specialists will save the device, replacing the original speaker will return the factory volume characteristics, which is impossible to Achie software crutches in case of physical failure.