How to increase the volume of the microphone on the Xiaomi phone: from settings to the engineering menu

Have you noticed that the person who is constantly asking you questions during calls and voice messages are recorded too quietly? The problem of low microphone volume on Xiaomi, Redmi and POCO smartphones is more common than it seems. The reasons may lie in both the software limitations of the MIUI and in the hardware features of a particular model - for example, the Redmi Note 10 Pro or the POCO X3 Pro often suffer from low sensitivity of the lower microphone.

In this article, we'll look at 7 proven ways to turn up the microphone volume, from basic audio settings to hidden menu options to third-party utilities. Importantly, some methods require root rights or developer mode activation, so first check out the simple solutions. If the problem occurred after the MIUI update, it's likely that the change in the audio processing policy is to blame, too.

1. Check basic sound and microphone settings

Before you dig deep into the settings, make sure that the problem isn't solved by standard means.

• 🔊 The microphone volume level in calls: press the up/down volume button during a conversation and select the microphone icon (if available). On some Xiaomi models, this regulator is hidden - it can be called by touching the microphone icon on the call screen.
• 🎤 Sound recording settings: Open the Dictaphone app or Call Recorder app and check the input level. If the volume slider is locked, the firmware level limit is set.
• 📱 Do Not Disturb: Sometimes it blocks the microphone for background apps. Turn it off in the notification curtain or along the Settings path → Sound. → Don't disturb.

If the volume hasn't changed after this manipulation, then move on to the next step. Note that on some models (such as the Xiaomi 12T), the microphone can automatically dim in high winds or noisy environments — this is Feature, not a bug. To turn this feature off, you will need access to an engineering menu.

2. Cleaning the microphone from dust and checking hardware malfunctions

A common cause of silent microphones is grid contamination or mechanical damage, and most Xiaomi smartphones have microphones:

• 📍 Bottom of the case (main microphone for calls).
• 📍 Up next to the speaker (an additional microphone for noise reduction).
• 📍 On the back (some models, for example, Xiaomi Mi 11 Ultra).

To clean, use a soft brush (for example, for camera lenses) or compressed air. Never blow the microphone with your mouth - moisture from breathing can damage the membrane! If the problem remains after cleaning, check the microphone for physical damage:

⚠️ Attention: If the microphone stopped working after the phone fell or a characteristic crack appeared, most likely, the plume broke off or the membrane was damaged. In this case, only a service center will help.

To rule out hardware malfunction, record the sound through another device (such as headphones with a microphone) or test the phone in Safe Mode:

1. Press the power button before the menu appears.
2. Select Safe Mode (Safe Mode).
3. Check the microphone in this mode. If it's working properly, it's third-party software.

3.Use of the engineering menu to manually adjust the microphone

The engineering menu (#4636## or #36446337##) allows you to manually increase the sensitivity of the microphone, bypassing the limitations of MIUI. This method works on most models, but requires caution - incorrect settings can worsen the sound quality.

Instructions for Xiaomi/Redmi/POCO:

1. Open the Phone app and enter the combination ##4636##.
2. Go to the Hardware Testing tab (or Audio, depending on the model).
3. Choose Microphone or Audio → Mic.
4. In the Type field, select Mic, and in Level, select the maximum value (usually 255 or 6).
5. Press Set and restart the phone.

If #4636### doesn’t work, try the alternative codes:

⚠️ Attention: On some firmware MIUI 14+ The engineering menu may be blocked, in which case you need to activate the developer mode (Settings) → The phone. → Version. MIUI — press 7 times and use ADB-unlocker.

Battery charge > 50%|Make a backup copy of the data|Record the current sound settings|Use the original cable (if necessary) ADB)-->

4. Third-party applications for microphone amplification

If standard methods didn't work, try specialized utilities that work on top of system settings and can increase the volume of the microphone software.

• 🎛️ Microphone Volume Booster (requires root): allows you to increase the volume to 200% It's from standard, but it can be introduced noise. 9/10 old models.
• 🔊 SoundAbout: Redirects audio streams and allows you to select the microphone for recordings, useful if the main microphone is damaged, but an additional microphone is running.
• 📱 WO Mic: transmits sound from microphone to PC Wi-Fi/Bluetooth, where it can be amplified programmatically (e.g., through Audacity) relevant for streamers or podcast recordings.

Installation and configuration using the example of Microphone Volume Booster:

1. Download APK from the official website (not from the Play Market, there may be an outdated version).
2. Allow installation from unknown sources in Settings → Applications → Special Access.
3. Launch the app and move the Mic Gain slider to +10-15 dB.
4. Reboot the phone.

Important: such applications increase the load on the processor and can reduce battery life. On Xiaomi with Snapdragon 7xx/8xx processors (for example, POCO F4), this is less critical than on budget chips (Helio G85 in Redmi 9A).

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Before using microphone amplifiers, check the temperature of the phone in the CPU Monitor app. If the processor is warming above 50°C, reduce the gain.

5. Adjust microphone via ADB (for advanced users)

If the engineering menu is not available, and root does not want to get, there is an option with the ADB-This method allows you to change the system parameters of sound without deep interference:

• 🖥️ Computer with installed ADB and Fastboot Tools.
• 📱 Developer's Included Mode and Debugging USB phone-on.
• 🔌 Original. USB-cable (not all cables support data transmission).

Step-by-step:

1. Connect the phone to the PC and confirm the debugging permission.
2. Open the command prompt (Windows) or terminal (macOS/Linux) and type: adb devices Make sure the device is defined.
3. Get the list of audio parameters: adb shell settings list global | grep audio
4. Increase the volume of the microphone (example for the voice_call): adb shell settings put global mic_gain_value 6 Meaning 6 — The most expensive for most models. 11T Pro may be required 5.

After you've done the commands, restart your phone. If the sound is better, fix the settings by creating a script to automatically use when you boot. Use Tasker or MacroDroid to do that.

⚠️ Attention: Wrong ADB-If the microphone stops working completely after the changes, reset the sound settings to the standard command: adb shell settings delete global settings mic_gain_value

6. Update firmware and reset sound settings

If the problem occurred after the MIUI update, it could be a bug in the sound stack. For example, MIUI 13.0.4 for the Redmi Note 11 Pro+ had a bug that automatically lowered the microphone volume when the battery was low.

• 🔄 Update your firmware to the latest stable version via Settings → Update system. Before updating, check the feedback on the forums (for example, 4PDA XDA-Developers – sometimes newer versions make the problem worse.
• 📉 Reverse to previous firmware: if the volume dropped after the update, return to the old version via the Mi Flash Tool.
• ⚙️ Resetting sound settings: go to Settings → System system → Resetting settings → Reset the audio settings. That would bring all the audio parameters back to factory values.

If you use custom firmware (e.g. Pixel Experience or LineageOS), the problem may be incorrect drivers.

1. Check for updates for your firmware.
2. Install an alternative core (such as FrancoKernel) if it supports your model.
3. Contact firmware developers on XDA – they can release a patch.

7.Alternative solutions: external microphones and service center

If all software methods have been tried and the microphone is still not working well, consider the following options:

• 🎙️ External microphone: connect through USB-C Or Bluetooth. Xiaomi is fine: BOYA BY-M1 (wired, 3.5 mm → USB-C Rode VideoMic Me (for streaming). JBL Quantum 800 (wireless headphones with microphone).
• 🔧 Replacement of microphone in the service center: the average cost of repairs is 1,500–3,000 ₽. On models with protection IP53 (For example, the Redmi Note 12 Pro+) The microphone often fails due to moisture.
• 📱 Using a second phone: If you need to record a clean sound (for example, for an interview), use the second smartphone as an external microphone through the app. WO Mic or AudioRelay.

For streamers and musicians, the best solution is USB-microphone (e.g., Fifine) K669B), phone-connected OTG-Cable. Xiaomi on Snapdragon. 8xx (Xiaomi 12 Pro is supported by USB Audio Class 2.0, which allows you to use professional microphones without delay.

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If the microphone works well in the headphones, but it doesn't work well through the built-in one, the problem is the hardware of the phone, and then software methods won't help.

FAQ: Frequent questions about the volume of the microphone on Xiaomi