Have you noticed that the interlocutor constantly asks you to repeat a phrase during a call? Or are voice messages being recorded too quietly, even though you speak into the microphone almost point-blank? The problem of low microphone volume on Android smartphones is more common than it seems. The reasons may lie both in software limitations and in the hardware features of the device. Fortunately, in 90% of cases the situation can be corrected without contacting a service center.

In this article we will look at all possible ways to increase the microphone volume - from basic Android settings to working with the engineering menu and third-party applications. You will learn what parameters are responsible for microphone sensitivity, how to bypass manufacturer restrictions, and what to do if the problem lies in a physical breakdown. We will separately dwell on the nuances for popular brands: Samsung, Xiaomi, Realme and others.

Important: before starting the settings, check whether the microphone is covered with a case or protective film. Sometimes it is enough to clean the microphone hole from dust or remove the sticker left after purchase. If the problem persists, read on.

1. Checking basic Android settings

Before delving into technical details, make sure that the problem cannot be solved by standard system tools. Many users overlook obvious parameters that can affect microphone volume.

Start by checking the following points:

  • 🔊 Microphone volume level during a call: during a call, press the volume up button - some firmware allows you to adjust not only the speaker, but also the microphone.
  • 🎤 Application Settings: in instant messengers (WhatsApp, Telegram, Viber) and calling apps (Zoom, Skype) often have a separate microphone volume slider.
  • 🔇 Do Not Disturb mode: make sure it is disabled or not blocking the microphone for selected applications.
  • 🔄 Switching microphones: some smartphones (for example Samsung Galaxy S22) have several microphones - try switching between them in the sound settings.

If you use headphones with microphone, the problem may lie in them. Try connecting a different headset or switch to your smartphone's built-in microphone. Also check if the mode ANC (active noise reduction) is activated - it can artificially reduce the sensitivity of the microphone.

📊 Which messenger do you most often use for voice messages?
WhatsApp
Telegram
Viber
VK
Other

2. Increasing the volume through the engineering menu

The most effective way to increase the sensitivity of the microphone is to change the parameters in engineering menu (Engineer Mode). This method works on most devices, but requires caution: incorrect settings can degrade sound quality or cause distortion.

Instructions for entering the engineering menu:

  1. Open the application Phone.
  2. Enter the combination: 
    ##4636##
  3. Select item Phone information (or Engineering Mode on some firmware).
  4. Go to the section Audio or Hardware Testing.

In the menu Audio find the parameters related to the microphone (usually they are indicated as Mic, Microphone or Speech). You need the following settings:

  • 🔊 Mic Volume — basic microphone volume (increase gradually, in steps of 5-10 units).
  • 🎛️ Mic Gain — signal amplification (values above 200 may cause noise).
  • 🔄 Noise Suppression — noise reduction (turn off or reduce if the voice sounds muffled).
What to do if the engineering menu does not open?

On some devices (for example, Xiaomi with MIUI 14+) the engineering menu is locked. In this case, try:

1. Install the application MTK Engineering Mode (for MediaTek processors) or Qualcomm EngineerMode (for Snapdragon).

2. Use ADB command: 

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

3. Enable developer mode and look for alternative codes for your model (for example, for Samsung this may be #0#).

Warning: after changing the parameters in the engineering menu be sure to test the microphone in real conditions. Too high values Mic Gain may lead to background, echo or distortion. If the interlocutor complains "metallic" sound or intermittent speech - return the settings to factory settings.

Increase Mic Volume by no more than 30% of the standard value|

Mic Gain should not exceed 150-180 (depending on the model)|

Disable Noise Suppression if your voice sounds unclear|

After the changes, restart your smartphone-->

3. Applications to enhance the microphone

If working with the engineering menu is too risky or it is inaccessible, third-party applications will come to the rescue. They allow you to increase the microphone volume programmatically, without changing system files. Let's consider the most reliable options:

Application Features Suitable for Cons
Microphone Volume Booster Simple interface, real-time volume control Calls, voice messages, streams Advertising, may not work on new versions of Android
SoundAbout Allows you to reassign microphones, change audio routes Zoom, Discord, video recording Complex interface, requires rights superuser for some functions
Voice Changer Microphone amplification + voice effects Voice messages, streams to Twitch/YouTube Paid functions, may distort the voice
Wo Mic Uses the smartphone as a microphone for a PC with signal amplification Streaming, podcasts, online games Requires driver installation on PC

When choosing an application, pay attention to user reviews of your smartphone model. For example, Microphone Volume Booster works well on Xiaomi Redmi Note, but may not run on Samsung Galaxy s One UI 5.0+ due to manufacturer restrictions.

Important nuance: some applications (for example, SoundAbout) require enabling developer mode and permission USB Debugging. To activate it:

  1. Go to Settings → About phone.
  2. tap 7 times on the item Build number.
  3. Return to main settings, open System → For Developers.
  4. Activate USB Debugging.
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If your microphone booster app isn't working, try disabling battery optimization for it. To do this, go to Settings → Applications → [app name] → Battery and select No restrictions.

4. Brand-specific settings

Smartphone manufacturers often modify Android to suit their needs, so universal methods may not work. Let's look at the features of increasing the microphone volume for popular brands.

Samsung (One UI)

On devices Samsung (for example, Galaxy S23, A54) there are hidden sound settings that can be activated through developer mode:

  1. Enable the mode developer (as described above).
  2. Go to Settings → For developers.
  3. Find the item Disable absolute volume level and activate it.
  4. Now an additional slider for the microphone will appear in the sound settings.

Xiaomi (MIUI)

On Xiaomi, Redmi i POCO the problem of a weak microphone is often associated with aggressive noise reduction. To disable it:

  1. Open Settings → Sound and vibration.
  2. Select Call quality.
  3. Disable options Voice enhancement i Noise reduction.

If this does not help, try resetting the network settings: Settings → SIM cards and mobile networks → Reset settings networks.

Realme/Oppo (ColorOS)

These devices have a built-in voice amplifierthat can be turned on:

  1. During a call, click on the icon ... (three dots).
  2. Select Voice enhancer.
  3. Move the slider to Amplify.
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On smartphones Realme and Oppo it is also useful to disable the function Dual microphone in the sound settings - it can artificially reduce the volume for noise reduction.

Google Pixel

Pure Android devices (for example Pixel 7) have minimalistic settings, but you can use ADB commands to increase volume:

adb shell settings put global mic_gain 200

Where 200 —gain value (can be increased to 250). After completing the command, reboot your smartphone.

5. Hardware reasons for low microphone volume

If software methods do not help, the problem may lie in physical malfunction. Here are the most common hardware reasons:

  • 🔌 Poor microphone contact: often occurs after dropping or disassembling a smartphone. The microphone may move away from the board.
  • 💦 Moisture ingress: even after drying, oxidation of the contacts can degrade the sound quality.
  • 🧹 Microphone contamination: dust, lint or dirt in the microphone hole reduces it sensitivity.
  • 🔋 Microphone wear: over time, the microphone membrane loses its elasticity, especially on budget models.

How to diagnose a hardware problem:

  1. Try to record your voice with different distances (5 cm, 20 cm, 50 cm). If the volume hardly changes, the microphone is faulty.
  2. Connect headphones with a microphone. If the sound through them is normal, the problem is in the main microphone of the smartphone.
  3. Check the microphone in safe mode (hold down the power button → Safe Mode). If the problem remains, the hardware is to blame.
How to clean the microphone yourself?

1. Use toothpick with cotton woolmoistened in alcohol (do not overdo it with pressure!).

2. A a can of compressed air (keep at a distance of 10 cm) is suitable for removing dust.

3. Do not use metal objects or needles - they may damage the microphone membrane.

4. After cleaning, let the smartphone dry for 10-15 minutes.

⚠️ Attention: if the smartphone has been dropped or come into contact with water, do not try to disassemble it yourself. Modern microphones (for example, in iPhone or Samsung Galaxy S-series) have a laminated design, and unprofessional repairs can completely damage them. In such cases, contact the service center.

6. Alternative solutions

If you cannot increase the microphone volume, consider alternative options:

Use an external microphone

Connect headset with microphone or USB/Type-C microphone (for example, Boya BY-M1 or Rode VideoMic). Most modern smartphones support external microphones via:

  • 🎧 3.5 mm jack (if available).
  • 🔌 Type-C port (required OTG adapter).
  • 📶 Bluetooth (microphones JBL, Sony).

Voice recording with subsequent amplification

If you need to send a voice message or record a podcast, use applications for subsequent audio processing:

  • 🎛️ Lexis Audio Editor — allows you to enhance your voice and remove noise.
  • 📈 Audio Evolution Mobile —multi-track editor with an equalizer.
  • 🎙️ Dolby On —automatically improves voice recordings.

Reassigning the microphone (for root)

On rooted devices, you can reassign second microphone (for example, for noise reduction) as the main one. To do this:

  1. Install Xposed Framework and module Audio Modification Library.
  2. In the module settings, select Microphone Remap.
  3. Specify which microphone to use by default.

⚠️ Attention: Reassigning microphones may cause noise cancellation or voice recognition to not work correctly (for example, Google Assistant). Before changing settings, make a backup copy of your data.

7. When to contact the service center

If none of the methods listed above helped, most likely the problem requires professional intervention. Contact the service center if:

  • 🔇 The microphone does not work at all (no response to voice).
  • 🔊 The microphone volume has dropped sharply after falling or getting wet.
  • 🔄 The problem appears only on one of the microphones (for example, the top one works, but the bottom one - no).
  • 📱 The smartphone is under warranty (self-repair will deprive you of warranty service).

The cost of replacing a microphone in a service center depends on the model:

Brand/Model Cost of replacing a microphone (approximately) Repair period
Samsung Galaxy A-series 1 200 — 2 500 ₽ 1-2 days
Xiaomi Redmi Note 1 000 — 2 000 ₽ 1 day
Google Pixel 2 500 — 4 000 ₽ 3-5 days
iPhone (unofficial service) 3 000 — 6 000 ₽ 2-4 days

Before visiting the service center:

  1. Make a backup copy of the data.
  2. Check whether the service uses original spare parts.
  3. Check reviews of the workshop (especially if we are talking about unofficial repair).
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If your smartphone is under warranty, do not tell the service that you tried to clean the microphone yourself or changed the settings through the engineering menu. This may cause warranty repair to be denied.

FAQ: Frequently asked questions about microphone volume on Android

❓ Why did the microphone become quieter after a firmware update?

Updates often reset sound settings or introduce new noise reduction algorithms. Try:

  1. Reset network settings (Settings → System → Reset → Reset network settings).
  2. Disable noise reduction in call settings.
  3. Check the microphone settings in the engineering menu (they could reset).

If the problem persists, rolling back to the previous firmware version may help, but it is risky and requires unlocking the bootloader.

❓ Is it possible to increase the microphone volume without root?

Yes, most of the methods in this article (engineering menu, applications, brand settings) do not require root access. However, to reassign microphones or deep sound settings (ViPER4Android), root may be needed.

If you do not want to get root, try:

  • Use an external microphone.
  • Enhance recording of voice messages in the editor.
  • Disable noise reduction in application settings.
❓ Why does the microphone work normally in the headphones, but the built-in one is quiet?

This indicates a malfunction of main. microphone the smartphone. Possible reasons:

  • Damage to the microphone contacts on the motherboard.
  • Contamination or oxidation of the microphone.
  • Software shutdown of the main microphone (for example, after a fall).

Solution: cleaning the microphone or replacing it at the service center Before the visit. check whether the microphone works in safe mode - if so, the problem is in the software, not in the hardware.

❓ How to check which microphone is used during a call?

On most smartphones, it is activated during a call bottom microphone (next to the charging connector). To check its operation:

  1. Open an application for recording sound (for example, Voice recorder).
  2. Close the top microphone (next to the front camera) with your finger and record your voice.
  3. Listen to the recording - if the voice is quiet, the problem is in the lower microphone.

On some models (for example, Samsung Galaxy S23 Ultrathere are three microphones: lower, upper and additional for noise reduction. You can check them through the engineering menu in the section Audio → Mic Test.

❓ Why after increasing the volume in. Is there background noise in the engineering menu?

This is due to the (gain) value being too high. To eliminate the noise: Mic Gain (gain). To eliminate noise:

  1. Return to the engineering menu and reduce Mic Gain by 20-30 units.
  2. Disable Noise Suppression (if it was enabled).
  3. Try decreasing Mic Volumebut increasing Speech TX Volume.

If the noise remains, reset the sound settings to factory settings or use a noise reduction app (for example, Krisp).