The earpiece of a smartphone is a small but critical element on which the quality of conversations and voice communications depends messages and even some notifications. If you notice that it has become difficult to hear the interlocutor, and the maximum volume during a call is insufficient, the problem is not always in the hardware. In 80% of cases, weak sound can be amplified by software without disassembling the phone.

On devices with Qualcomm (most Xiaomi, Samsung, OnePlus) and MediaTek (Redmi, Realme, Tecno) chips, hidden audio amplifier settings are available, which manufacturers disable by default due to EU and US hearing safety regulations. In this article we will look at legal and technically sound methods - from basic Android settings to working with the engineering menu and modified firmware.

It is important to understand the difference between hardware limitations (speaker wear, manufacturing defects) and software. If the sound becomes quiet after dropping the phone or getting wet, no settings will help, the speaker will need to be replaced. But if the problem appeared after updating the system or was always present on a specific model (for example, Samsung Galaxy A12 or Redmi Note 10), the chances of a solution are high.

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1. Checking basic Android settings

Before you dig deeper, make sure that the problem is not in trivial settings. Let's start with the obvious - volume controls and sound profiles.

During a call, press volume buttons —a slider with the inscription "Ring volume"will appear on the screen. Make sure it is set to maximum. On some firmware (for example, MIUI or ColorOS) there are separate controls for ringtones, notifications and multimedia. The auditory speaker depends on the first parameter.

If the slider is already at maximum, check:

  • 🔇 Do not disturb mode: it may block call sounds. Open the notification panel and make sure that the bell icon is not crossed out.
  • 📞 Call settings: in the application Phone → Settings → Call sounds the option can be disabled "Voice enhancement" (available on Samsung i Google Pixel).
  • 🔄 Sound profile: on some devices (for example, Huawei) there are profiles "General", "Outdoor", "Indoor" - select "Outdoor" for maximum volume.

On firmware MIUI (Xiaomi, Redmi, POCO) there is a hidden function "Smart sound enhancement". enable:

  1. Open Settings → Sound and vibration.
  2. Tap on Additional settings (bottom screen).
  3. Activate the switch "Boost sound when calling".
⚠️ Attention: On some models Samsung (series Galaxy A i Galaxy M) after updating to Android 13/14 the volume control of the auditory speaker disappeared. This is a firmware bug - check for updates in Settings → Software update.

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2. Cleaning the speaker and connectors

Dust, lint or moisture in the speaker hole can physically muffle the sound. This is especially true for phones with bottom speaker position (for example, iPhone-shaped models or Google Pixel 6).

How to clean:

  1. Take toothpick (not metal!) and carefully circle the edges of the speaker hole. Do not press - the speaker membrane is thin and breaks easily.
  2. Use can of compressed air (to clean keyboards) - blow out the dust with short presses. Hold the can vertically so as not to splash the liquid.
  3. To remove If the speaker or sound is interrupted, the problem may be on the board. In this case, only a service center will help. bag of silica gel (from a shoe box) for 12–24 hours.

If the speaker wheezing or the sound is interrupted, the problem may be oxidized contacts on the board. In this case, only a service center will help.

📊 How often do you clean the speakers of your smartphone?
Once a month
Once every six months
Only when problems appear
Never

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3. Using third-party applications to enhance sound

If system settings do not produce results, try specialized utilities. They work on two principles:

  1. Software amplification - increase. amplitude of the sound signal (effective, but distortion may occur).
  2. Equalizer correction - raises voice frequencies (300–3000 Hz), making speech clearer.

Best applications (free, without root):

  • 🔊 Volume Booster GOODEV —a simple booster with preliminary profiles for calls. Suitable for Android 8–14.
  • 🎛️ Equalizer FX —allows you to manually adjust the equalizer for the auditory speaker (select the “Vocal Boost” preset).
  • 📞 Sound Amplifier (from Google)—enhances the sound in headphones and speakers, there is a noise filtering function.

To install:

  1. Download the application from Google Play.
  2. Run and grant permission to change system sound settings (required!).
  3. Enable mode "Call Boost" or adjust the equalizer (raise the sliders to 300–1000 Hz).
⚠️ Attention: Applications like Volume Booster can distort the sound at maximum volume. If wheezing or whistling appears, reduce the gain to 120–130% of the standard level.

Make sure that the speaker is not physically damaged

Download the application only from official store

Read reviews about compatibility with your phone model

Do not install APK from third-party sources-->

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4. Engineering menu and hidden settings

Manufacturers hide advanced audio settings in engineering menu (Engineer Mode. You can get there through secret codes or special applications. Be careful - incorrect changes can lead to sound failure.

Ways to open the engineering menu:

  • 📱 Via code: Dial in the application Phone: 
    ##36446337##

    (works on MediaTekchips, for example, Redmi 9A or Realme C21).

  • 🔧 through the app: Install MTK Engineering Mode (for MediaTek) or Qualcomm Engineer Mode (for Snapdragon).

In the engineering menu:

  1. Go to section Hardware Testing → Audio.
  2. Select LoudSpeaker Mode (or Normal Mode for the auditory speaker).
  3. Find the parameters:
    • Max Vol —maximum volume (set 160 instead of 128).
    • Type — select Sph (for earpiece speaker).
    • Level —increase to 6 or 7 (default 4).
  • Save the settings and reboot the phone.
    • Parameter Default value Recommended value Consequences if exceeded
    Max Vol 128 150–160 Sound distortion (>160)
    Level 4 6 Wheezing at level >7
    Type Media Sph (for calls) Does not work for multimedia
    ⚠️ Attention: On some firmware (for example, ColorOS 13+ on Oppo/Reno) the engineering menu is locked. An attempt to enter may cause a reset. Before experiments make a backup copy through Settings → System → Backup.
    What to do if the engineering menu does not open?

    If the code does not work, try:

    1. Install the application Shortcut Master and find the activity called "EngineerMode".

    2. Use ADB command:

    adb shell am start -n com.android.settings/.DevelopmentSettings

    3. On some Samsung you first need to enable developer mode (7 taps on the build number in Settings → About phone).

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    5. Modification of system files (requires root)

    If you are willing to take risks, you can edit system files responsible for volume restrictions. This method requires root access works on most firmwares, except Samsung Knox (there is blocking at the kernel level).

    Instructions:

    1. Install Root Explorer or FX File Explorer with access to the root folder.
    2. Navigate to the path: 
      /system/etc/

      Find the file mixer_paths.xml (or mixer_paths_qrd_skuh.xml for Qualcomm).

    3. Make a backup copy of the file (copy to SD card).
    4. Open the file in a text editor and find the lines: 
      <path name="handset-mic">

      <ctl name="RX1 Digital Volume" value="84" />

      Change value with 84 on 92 (maximum - 96, but risk of distortion).

    5. Save the file, set the permissions 644 (rw-r--r--) and reboot the phone.

      6. For devices on MediaTek the path may be different: 

      /vendor/etc/audio_effects.conf

      Look for the parameters speech_volume_max and voice_volume_max.

      💡

      Before editing system files, check them for backup copies in the folder /system/etc/backupSome. firmware (for example LineageOS) automatically restores the original files after a reboot.

      ⚠️ Attention: Incorrect editing mixer_paths.xml can lead to complete loss of sound or a boot loop. If after the changes the phone does not turn on, boot into Recovery Mode and restore the backup.

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      6. Alternative firmware and kernels

      If standard methods do not help, consider installing custom firmware or modified kernel. This is a radical method, but it gives complete control over audio settings.

      Popular firmware with improved sound:

      • 📱 LineageOS —has a built-in equalizer ViPER4Android (you need to install the drivers).
      • 🔊 Resurrection Remix —allows you to adjust the volume for each type of speaker separately.
      • 🎛️ Havoc-OS —supports Dolby Atmos for calls (on some devices).

    To install:

    1. Unlock bootloader (instructions differ for each brand).
    2. Install custom recovery (TWRP or OrangeFox).
    3. Flash the firmware and GApps (if you need Google services).
    4. After downloading, install ViPER4Android and activate the profile "Clear Voice".

    For devices Samsung with processors Exynos there are special kernels, for example, Arter97 Kernelwhich increase the power of the amplifier by 20-30%. However, they require Knox approvalwhich resets the counter Knox Warranty Void (the warranty is lost).

    💡

    Custom firmware gives maximum control over the sound, but requires unlocking the bootloader. This voids the warranty and may interfere with the operation of banking applications (due to the lack of Google Play Protect certification).

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    7. Hardware solutions: amplifiers and accessories

    If software methods have been exhausted, and the sound is still quiet, consider external amplifiers or replacing the speaker.

    Options:

    • 🎧 Bluetooth headset —even budget models (for example, Xiaomi Mi True Wireless Earbuds) will give clearer sound than the built-in speaker.
    • 🔊 External amplifier - devices like FiiO A1 connect via USB-C and amplify the analog signal.
    • 🛠️ Replacing the speaker - if the membrane is torn or the contacts are oxidized, a new speaker (original or analogue from Avencall) will return the volume. Cost - from 300 to 1500 rubles.

    For a temporary solution, you can use over-ear speaker (for example, JBL Clip 4), connected via Bluetooth. Turn on the mode "Speakerphone" in the call settings - the sound will come through an external speaker.

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    FAQ: Frequently asked questions

    Is it possible to enhance the sound without root?

    Yes, most of the methods in this article (Android settings, applications, engineering menu) do not require root. However, the maximum effect is achieved by editing system files, which requires root access.

    Why is there sound after updating Android? has become quieter?

    Manufacturers often lower the volume in new firmware versions due to European regulations EN 50332-2 (limiting the sound level to protect hearing). Try rolling back to the previous version or using boosters.

    Is it safe to increase the volume in the engineering menu?

    Yes, if you do not exceed the value Max Vol = 160. At 180+ the risk of speaker damage or sound distortion increases by 3-4 times. Samsung With Exynos safe limit - 150.

    Will resetting the settings help?

    In rare cases, yes - if the problem is caused by a glitch in the sound settings. But more often, resetting does not affect hardware limitations. Before resetting, make a backup via Settings → System → Backup.

    How check if the speaker is broken?

    Run the speaker test through the engineering menu (Audio → Speaker Test) or the application Phone Doctor Plus. If there is sound, but it is quiet, the problem is software. If there is no sound at all, the speaker is faulty.