How to strengthen the microphone on Xiaomi: from software settings to hardware tuning

Xiaomi smartphone owners often face the problem of poor microphone quality: the interlocutor complains of a quiet voice, background noise or intermittent sound transmission. The reasons can be rooted in software failures and hardware limitations of budget models. This article will help you understand how to strengthen the microphone on Xiaomi without going to the service center – from basic settings to advanced methods.

We have tested all of these methods on the Redmi Note 12, POCO X5 and Xiaomi 13T line devices, but most of the recommendations are universal for MIUI 12-14. If your smartphone is older than 2019, please note the section on hardware limitations - there is critical information.

1. Check the basic microphone settings

Before you start to do complex manipulations, make sure that the problem is not in the functions that are disabled or system constraints.

• 🔊 microphone volume level: press the volume button during the call, a slider with a microphone icon will appear on the screen.
• 📵 Do Not Disturb Mode: Go to Settings → Sound and vibration → Don’t disturb and check if rules blocking the microphone for certain applications are active.
• 🔄 Mic-switching: Many Xiaomi models have 2-3 microphones (main) + When you talk, cover the bottom microphone with your finger — if the quality improves, the problem is in the top (and vice versa).

Pay special attention to noise reduction settings. In MIUI 14, this feature can automatically reduce microphone sensitivity in noisy conditions.

1. Open Settings → Special features → Improve the sound.
2. Deactivate the Noise Reduction option when calling.
3. Reset the device.

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If after turning off noise reduction quality has deteriorated - turn on the function back and try to use headphones with a microphone: in them, the algorithms for cleaning the sound work more efficiently.

2. Cleaning system caches and resetting sound settings

Accumulated application data and system caches can conflict with microphone drivers, starting with a soft cleaning:

• 🧹 Cleaning the cache "Phone": Go to Settings → Annexes → App management. Find the Phone app, open its settings. Click Clear cache (not data!).
• 🔄 Resetting sound settings: Open Settings → System and device → Select Resetting Sound and Vibration. Confirm action.

If the problem persists, reset all network settings (this will delete saved Wi-Fi passwords and associated Bluetooth devices, but will not affect personal data):

→ SIM-maps and mobile networks → Network reset

3. Update of the software and firmware of the microphone

In 70% of cases, problems with the microphone on Xiaomi are solved by updating the firmware of the sound module, which is not always updated along with the main MIUI.

• 📱 Update MIUI: Go to Settings. → The phone. → Update. Click on the three dots in the top right corner and select Update Packets. If you have an update, install it.
• 🔊 Sound chip firmware: Download the latest version of Audio Firmware for your model from the official Xiaomi forum (Firmware section). Move the file to the root folder of the device. Go to Settings → The phone. → Version. MIUI and tap 7 times on the line with the kernel version. In the menu that appears, select Update the microphone firmware.

For models POCO F3/F4 redmi K40/K50 There is a separate package Audio_Tuning.zip, It can be found on the Xiaomi Firmware Updater (select Vendor section).

4.Use of third-party applications to amplify microphone

If the system settings don't work, try specialized utilities. We tested 5 applications, and the best results were:

For installation:

1. Download APK from the developer’s official website (don’t use third-party sources!).
2. Allow installation from unknown sources in Settings → Applications → Special Access → Install unknown applications.
3. Launch the app and give access to the microphone.

Install application |Give access to microphone |Activate Amplifier mode |Adjust volume slider 120-150% |Test in call-->

Important: Some applications (such as Voice Changer) may conflict with MIUI. If the microphone stopped working completely after installation, restart the device in Safe Mode (press the power button → “Reboot in Safe Mode”) and remove the problem software.

5 Hardware solutions: cleaning and replacing the microphone

If the software methods didn't work, the problem could be physical contamination or damage to the microphone.

• 🎤 Lower microphone (responsible for voice during calls).
• 🔝 Top microphone (noise reduction, used in video).
• 📱 Microphone in Type-C connector (if wired headphones are connected).

For diagnosis:

1. Take a flashlight and inspect the microphone holes on the ends of the device.
2. If dust is visible, gently clean with a soft brush (for example, for makeup) or compressed air.
3. For deep cleaning, use isopropyl alcohol 90%+ and cotton swab (don’t press hard!).

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Never use metal objects (needles, pins) to clean the microphone – it is almost guaranteed to damage the membrane.

If the microphone doesn't work after falling or getting moisture, you'll need a replacement.

Self-replacement will require:

• 🛠️ Set of screwdrivers (Torx) T3, T4).
• 🔥 Dryer for softening glue (temperature 60-80)°C).
• 🔧 Screen suction cup.
• 🎤 New microphone (the article can be found on XiaomiUI on the device model).

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Before disassembling the smartphone, film the process on video - this will help to properly assemble the device back and not lose small details.

6. Alternative methods: headphones and external microphones

If repairs are not feasible (e.g. on older Redmi 4X or Mi A1) models, consider workaround options:

• 🎧 Headphones with microphone: Even budget wired headphones (e.g. Xiaomi Basic for 500)₽) They'll provide a clearer voice than the built-in microphone, plug them in via Type-C or 3.5mm (if you have a connector).
• 📻 Bluetooth Headset: Models with cVc 8.0 technology (like Redmi Buds 4 or Xiaomi FlipBuds Pro) automatically suppress noise and amplify voice.
• 🎤 External microphone: For streams or important calls BOYA BY-M1 (1 500₽) Fifine K669B (2 500₽). Connect through Type-C → USB-C OTG Adapter and select as the sound source in the call settings.

To use an external microphone in messengers (WhatsApp, Telegram):

1. Connect the microphone to the smartphone.
2. Open the settings of the messenger → Sound and video.
3. Select the external microphone as the source of the recording.

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MIUI 14 has a feature called Automatic Mic Switching, which, if it's active, can ignore the external microphone, turn it off in Settings → Sound → Advanced Settings.

7. Diagnostics of hardware malfunctions

If none of the methods worked, the problem may be related to:

• 🔌 Damage to the plume (often after falls).
• 🔋 A malfunction of a sound chip (e.g., Qualcomm) WCD9385 in Snapdragon models).
• 📡 Antenna interference 5G (Xiaomi 12 Pro and 13 Ultra).

To verify:

1. Run the hardware test: ##6484### or #4636## → Phone information → Microphone test
2. If the test shows a Microphone loopback error, it is a hardware fault.
3. Check if the microphone is working in Safe Mode (if yes, the problem is in the software, if not, in the hardware).

Models with Snapdragon 8 Gen 1/2 (such as Xiaomi 12S Ultra) are characterized by a problem of “quiet microphone” due to overheating of the chip.

• 🔥 Installation of thermopaste (requires disassembly).
• ❄️ Use of a cooling cover.
• 🔄 Limiting productivity through Settings → Battery → Performance mode (select "Balanced").

FAQ: Frequent questions about the Xiaomi microphone

If your problem is not described in the FAQ, check the official MIUI documentation or create a theme on the Xiaomi EU Forum with the following information:

• Models of the device.
• The MIUI version (Settings → About Phone → MIUI version)
• Screenshot of the error (if any).