How to increase the volume of a call on Xiaomi: an expert guide

When you stop hearing someone during an important conversation or they complain about a quiet sound, it’s familiar to many smartphone owners. It’s not just a discomfort, but a real problem that interferes with workflow or personal communication. Xiaomi device owners often face regional volume restrictions, especially in the firmware versions for the European market or the global shells MIUI and HyperOS.

The problem of silent sound can be both software constraints and physical obstacles, such as speaker pollution. Before you bring a device to a service center, you should try a number of software settings that are often ignored by users. In this article, we will discuss all the available methods, from simple menu switches to the use of engineering codes.

We're going to look at how to activate hidden functions, clear the audio track, and adjust the equalizer to maximize speech intelligibility. It's important to understand that call volume and multimedia volume are controlled by different sliders, and you can't confuse them. Let's figure out how to get the most out of your smartphone's speaker system.

Basic sound settings and checking sliders

The first thing to do is to make sure the basic settings are correct. Often users accidentally reset the sound level or activate modes that limit it. With modern MIUI and HyperOS shells, audio stream management has become more detailed, allowing for flexible customization of each use case.

To start, press any volume button on the side of the device. A scale will appear on the screen. Pay attention to the gear icon or the arrow down next to the slider -- click on it to open the extended menu. Here you'll see individual sliders for media, call, alarm and notifications. Make sure that the slider responsible for the phone call is twisted to the maximum.

It’s also worth checking whether Do Not Disturb or Silence mode is on, which can visually show high volume but programmatically block the audio signal when an incoming call is injected, and in some cases switching the region in the system settings helps, as different countries have their own legal restrictions on maximum sound power.

Remember that software sliders are just the first level of adjustment, and even if the sound is silent at the maximum, the problem may be deeper, but you can't ignore the basic settings, because they take precedence when playing the sound of the call.

Cleaning the speaker and eliminating physical interference

The physical state of the dynamic system directly affects the sound quality and volume. The mesh holes of the speaker, located at the top of the screen, are often clogged with dust, pocket pile or earwax, which creates an acoustic stopper that silences the sound even at maximum power.

To clean, use a soft toothbrush with dry bristles. Carefully, without heavy pressure, walk along the speaker grid in circular motions. You can also use paint tape or special sticky tape, gluing and unsticking it from the speaker surface to pull out the stuck dust. The use of compressed air is permissible, but only in short "puffs" and from a safe distance, so as not to damage the membrane.

⚠️ Warning: Never use sharp objects such as needles or pins to clean the speaker.You risk piercing the safety net and damaging the speaker itself, leading to wheezing or no sound at all.

Another physical cause of silent sound may be a protective film or glass covering the speaker's opening. If you've recently changed the protective coating, make sure it has special cutouts for the speaker and microphone. Cheap films can block the acoustic channels, significantly reducing the volume.

Use of engineering menu and CIT codes

Xiaomi smartphones have a hidden engineering menu section that can be accessed through a special code in the “bell ringer” that is designed to test hardware, but also allows you to fine-tune audio streams. Be careful: changing unknown parameters can lead to unstable system operation.

To enter the test menu, open the Phone app and dial ##6484##. The CIT menu will open. Find the item associated with the speaker test (usually called "Receiver" or "Top Speaker"). In some firmware versions, you can test the sound here to see if the problem is hardware or software.

A more advanced way is to use the code to log into the Android engineering menu. Dial ##3646633##. If the code doesn't work on your shell version, try ##8255#. In the menu that opens, go to the Hardware Testing -> Audio -> Audio Debug tab. Here you can find settings (Gain) for various scenarios, including Normal Mode (normal mode) and Headset Mode (headset mode).

Changing the parameters in the engineering menu requires accuracy. Write down the initial values before making changes. Usually, increasing the Gain value by 3-6 dB gives a noticeable increase in volume without distortion. Exceeding the limits can lead to wheezing or failure of the speaker.

Equalizer and sound effects setting

The MIUI has built-in audio tuning tools that are often underestimated. The right equalizer configuration can make the speaker's speech clearer and louder by ear, even if the physical power of the speaker has not changed. The focus on medium and high frequencies improves intelligibility.

Go to Settings -> Sound and Vibration -> Sound Effects. Here you will find an equalizer. Try to choose the preset Voice or Clarity if available. If you use manual mode, lift the sliders slightly in the 1kHz to 4kHz range. It is in this frequency range that the basic information of human speech lies.

Also on the sound effects menu, look for the Sound Improvement or Mi Sound Enhancer feature, which can add volume, but sometimes it can quieten quieter sounds by compressing. Experiment with this switch during a test call.

And don't forget third-party equalizer apps from Google Play, like Volume Booster GOODEV or Precise Volume, which allow you to amplify the sound programmatically, vυṇṭ the standard system constraints. However, use them with caution: excessive amplification can lead to digital distortion and wheezing.

Comparison of volume-raising techniques

There are many ways to solve the problem of quiet sound, but their effectiveness and safety vary. Below is a table that will help you choose the best method depending on your situation and level of training.

As you can see from the table, the safest and often most effective method is physical cleaning. If it doesn't work, go to software settings. The engineering menu gives the best result, but it requires understanding what you're doing.

💡

An integrated approach – a combination of cleaning the speaker, setting the equalizer and adjustments in the engineering menu gives the maximum result.

Change of region and resetting of settings

One of the features of Xiaomi smartphones is that they link volume limits to a selected region, such as some European countries that have strict sound pressure standards to protect users’ hearing, and changing the region to a country with less stringent standards (such as India, Nepal or the United States) can unlock the extra volume.

To change region, go to Settings -> Additional -> Region. Select the right country. After changing region, the phone may restart or require re-setting some settings. Check the volume level after this procedure.

If software failures become critical and the sound is gone after the system update, resetting to factory settings can help.Be sure to back up all important data before doing so, as this procedure will delete all your files, contacts and applications.

⚠️ Attention: Data reset is a radical measure. Make sure the problem is not solved with softer methods, such as clearing the cache of the Phone app or removing newly installed applications that conflict with the sound system.

Once reset, the phone will return to its original state and all system constraints will be reset to factory values.This often helps if the problem was caused by an erroneous update of the system's configuration files.

Frequently Asked Questions (FAQ)

💡

If you talk frequently in noisy places, turn on the Noise Cancel feature in your call settings, but remember that it can slightly lower the overall volume of your voice for the sake of sound clarity.