How to improve the sound quality of the microphone on Xiaomi smartphones: from settings to upgrades

Have you noticed that the person who is listening to you is not hearing well while you are making calls and voice messages sound like a barrel recording? Michone problems on Xiaomi smartphones are common, and the reason for this is not always hardware malfunctions. Often, the sound spoils the wrong settings, clogged connectors or software conflicts. In this article, we will discuss 7 proven ways to improve the sound of the microphone, from basic settings to hardware solutions for Redmi Note 10/11/12 models, POCO F3/F4/F5, Mi 11/12/13 and others.

It's important to understand that sound quality depends on a set of factors. For example, the Xiaomi 12 Pro with four microphones may be worse at voice than the Redmi Note 9 with one if the first one is on the default noise maker and the second one is properly configured. We won't advise "just buy a new phone" - instead, we will show you how to make the most of the current device, including hidden MIUI settings, cleaning contacts and choosing external microphones.

1. Checking the hardware serviceability of the microphone

Before you dig into the settings, make sure that the problem is not a physical breakdown. Xiaomi smartphones usually have 2-4 microphones:

• 🎤 The main microphone (the bottom of the case, next to the USB-C connector) is responsible for the voice during calls.
• 🎤 Second microphone (top, next to speaker) - used for noise reduction and stereo recording.
• 🎤 Additional microphones (on flagships like the Xiaomi 13 Ultra) are for spatial sound.

To check the performance:

1. Open the Dictaphone app (standard or third-party, such as Voice Recorder).
2. Write down 10-15 seconds of silence, then say a few phrases, closing each microphone with your finger.
3. Listen to the recording: if the sound is lost or becomes much quieter when one of the microphones is closed, this microphone works.

⚠️ Warning: If no microphone is responding to the recording, the problem may be a disconnected plume (frequent breakdown after falls) or damage to the audio codec, in which case only the service center will help.

Also check if the moisture is in the connectors.

• 🔦 Light the USB-C and 3.5mm connector (if any) with a flashlight — look for oxidation or corrosion.
• 🧹 Carefully clean the connectors with a plastic toothpick (not metal!).
• 💧 If water hits, put your phone in a silica gel bag for 12 to 24 hours (the rice life hack doesn't work!)

2.Mic setting in MIUI: hidden parameters

MIUI hides some of the microphone settings under the "developers" or in the engineering menu.

Method 1: Enabling the Developer Mode

1. Go to Settings. → The phone.
2. Click 7 times on the MIUI version (you will be notified "You became a developer").
3. Back to Settings → Additionally. → For developers.
4. Find the USB Debugging option and turn it on (this will unlock additional settings).

Method 2: Engineering Menu (MTK/Qualcomm)

For Qualcomm processors (most Xiaomi):

#4636### → Testing → Microphone

For MediaTek (rarely, but found in budget models):

##36446337## → Hardware Testing → Audio → Mic Test

In the engineering menu, you'll see a graph of the microphone signal strength.

• 📊 Noise level: up to -50 dB.
• 📊 Voice level: -30 dB to -10 dB.

⚠️ Warning: If the signal level is below -60 dB even when you speak, the microphone is faulty or is silenced programmatically (for example, after a failed root).

Method 3: Configuring noise reduction

In MIUI 13/14, the default noise maker can eat up a portion of the voice to turn it off:

1. Go to Settings → Sound and vibration → Sound quality.
2. Turn off the voice improvement or noise suppression option.
3. For calls: Settings → SIM- Maps and mobile networks → Call settings → Voice Improvement → Select Disconnected.

Developer mode is on|Signal level checked in the engineering menu|Noise cancellation is disabled in call settings|Test recording in a quiet and noisy room-->

3. Software solutions: applications and firmware

If hardware checks have not revealed problems, try reflashing audio drivers or using third-party apps.

Top-3 applications for improving microphone sound:

• 🎛️ Wavelet (from the creators of Viper4Android) -- allows you to adjust the equalizer for the microphone, remove hissing and improve voice clarity. Requires root for full functionality.
• 🔊 Microphone Amplifier – amplifies the microphone signal (caution: background noise may appear!).
• 🎙️ Voice Changer – Not only does it change the voice, it also clears the sound of interference (good for streams).

Reflashing audio drivers

If the microphone gets worse after the MIUI update, try rolling back to the previous version or installing a custom core (for example, FrancoKernel for POCO F3).

1. Download the firmware for your model.
2. Go to Settings → About Phone → System Update → Three Dots → Select a firmware file.
3. Select the downloaded file and wait for the installation.

⚠️ Warning: On Dynamic RAM Expansion models (e.g., Redmi Note 11 Pro+) the virtual memory setting may reset after firmware is installed. Check it in Settings → Additional → Memory → Extension RAM.

For advanced users: editing mixer_paths.xml

This file is responsible for routing audio signals, so you can change it.

1. Get root rights (for example, through Magisk).
2. Open the /vendor/etc/mixer_paths.xml file in a text editor (e.g., Mixplorer).
3. Find the lines with mic and increase the gain values by 10-20%.

<path name="handset-mic">


<ctl name="ADC1 Volume" value="85" />




</path>

⚠️ Hazard: Incorrect values can cause damage to the microphone due to overload.

💡

Before editing system files, backup your phone via TWRP or Swift Backup, which will allow you to restore your phone if something goes wrong.

4. Cleaning connectors and contacts: step-by-step instructions

Dust, dirt or contact oxidation are common causes of bad sound, especially for models with a 3.5 mm connector (Redmi 9A, POCO M3) or USB-C (Xiaomi 12T, Redmi Note 11 Pro).

What you need:

• 🧴 Isopropyl alcohol (90% or higher).
• 🪥 Cotton swabs (better wooden, not plastic).
• 🔍 Loop or flashlight for inspection.
• 🧲 Magnetic screwdriver (for disassembly, if necessary).

Step-by-step cleaning:

1. Turn off the phone and remove it. SIM-memory-card.
2. Moisten the cotton swab in alcohol and gently wipe: 🔌 Contacts in the USB-C connector (especially the bottom). 🎧 A 3.5mm connector hole (if any). 🕳️ Microphone holes (usually near the main camera and bottom of the housing).

at least 30 minutes

If the cleanup didn't help:

• 🔧 Check the adhesive density of the microphone plume (disassembly required).
• 🔄 Try resetting the network settings (Settings → SIM- maps → Network settings reset).

5.External microphones and accessories for Xiaomi

If the built-in microphone is not working, consider external solutions, which are especially relevant for streamers, musicians or those who often call in noisy places.

Top-5 accessories for Xiaomi:

• 🎤 BOYA BY-M1 is a compact lavaier microphone with a TRRS connector (suitable for Redmi with a 3.5mm input). Price: ~1 500 ₽.
• 🎙️ Fifine K688 — USB- microphone to connect via OTG (requires an adapter USB-C → USB-A). Price: ~ 3000 ₽.
• 📱 Saramonic SmartMic + is a microphone with a Lightning/USB-C connector (suitable for Xiaomi 13 Lite without 3.5-mm). Price: ~ 4 500 ₽.
• 🎧 Xiaomi Mi True Wireless Earphones 2 — headphones with a good microphone for calls (built-in noise maker). Price: ~2000 ₽.
• 🔗 UGREEN Adapter USB-C → 3.5 mm — if your POCO X3 Pro does not have audio input. Price: ~ 500 ₽.

How to connect an external microphone:

1. For 3.5mm microphones: just insert into the connector (on some models you need to select the sound source in the recording settings).
2. For USB- microphones: Buy a OTG- adapter (e.g. Baseus USB-C to USB 3.0). Connect the microphone to the adapter, then to the phone. In the recording application (e.g. FilmoraGo), select the external microphone as the source.

⚠️ Warning: On Xiaomi with MIUI14, some USB- microphones may not be recognized due to kernel limitations. Check compatibility on forums (e.g. 4PDA before buying.

Budget Solution: Using a Second Phone as a Microphone

If you have an old smartphone (even not Xiaomi), it can be used as an external microphone.

1. Install WO Mic on both phones (available on Google Play).
2. Connect them to a single Wi-Fi network.
3. On the main phone, select the WO Mic sound source – the second phone.

💡

For streams and professional recording, an external microphone is mandatory – built-in Xiaomi will not cope with background noise and will provide low sound quality.

7.When to contact the service: signs of malfunction

If you've tried all the ways, but the microphone still doesn't work, it's probably a hardware problem. Here are 5 signs that it's time to bring the phone to service:

1. The microphone does not respond at all – no calls, no recording, no engineering menu.
2. Extraneous sounds – a crackling, squeaking or constant noise that does not depend on the surroundings.
3. Signal level drop – the voice level in the engineering menu is below -50 dB even when you are screaming.
4. Problems after falling/getting moisture – even if the phone turns on, the microphone could break away from the board.
5. Only one microphone out of several does not work (checked by a recording test with the openings closing alternately).

Cost of repairs in service centers (2026):

How to choose a service:

• 🔧 Official Xiaomi service is a 6 month warranty, but more expensive. List of centers: mi.com/ru/service.
• 🛠️ Unofficial workshops are cheaper, but they run the risk of poor repairs. Look for reviews on Yandex.Maps or 2GIS.
• 📦 Self-substitution - only if you have soldering experience. Xiaomi microphones are sold on AliExpress (price: 200-800 ₽).

⚠️ Warning: On models with IP53 (e.g. Redmi Note 11 Pro+) the dust protection may be damaged after unskilled repairs. Check with the master if the sealing will be restored.

FAQ: Frequent questions about Xiaomi microphones