How to improve the sound quality of conversations on the Xiaomi phone: from the microphone to network settings

Have you noticed that when calling on your Xiaomi, your interlocutor is not hearing well, the voice is interrupted or there are extraneous noises? The problem can lie not only in the hardware of the smartphone, but also in the software settings that most users do not even check. In this article, we will analyze all the possible causes of sound deterioration — from the banal pollution of the speaker to the hidden parameters of the network — and give specific solutions that work on models from Redmi Note 10 to Xiaomi 14 Ultra.

It's important to understand that the quality of the sound in a conversation depends on three key components: the microphone (as you hear), the speaker (as you hear the person), and the network connection (stability of voice transmission), and we'll analyze each of them, and also look at the rare cases when the problem lies in firmware or hardware malfunctions. If you're ready to return crystal clear sound, read on.

1. Inspection and cleaning of physical components

Before you dig into the settings, make sure the problem isn't mechanical. A polluted speaker or microphone is the most common cause of bad sound, especially if you often carry your phone in your pocket or use it in dusty conditions. On Xiaomi models, microphones are usually located:

• 📍 Bottom of the case (main microphone for conversations)
• 📍 Upstairs, next to the front camera (additional microphone for noise reduction)
• 📍 On the back (some models, for example, Xiaomi) 13T Pro)

To clean, use a soft brush (like makeup) or a toothpick with cotton wool dipped in alcohol. Never blow into a microphone or speaker - this can drive the dust deeper or damage the membrane. If the sound hasn't improved after cleaning, go to software settings.

⚠️ Attention: On models with IP53/IP68 (for example, Xiaomi 12S Ultra) The microphones are protected by a grid. Don't try to remove it, it will break the tightness!

2. Configure call parameters in MIUI

MIUI offers a few hidden and non-obvious settings that directly affect sound quality.

1. Voice Amplification: Go to Settings → Special Features → Sound Amplification and turn on the "Improving Sound When Speaking" option, which activates noise reduction and voice amplification algorithms.
2. In the car mode: In the same settings, find "In-car mode" - it optimizes sound for hands-free communication, reducing echo.
3. Monosound: If you have difficulty hearing in one ear, turn on Settings → Special Options → Monosound.

For advanced users, there are engineering settings available (not working on all models) to get there:

1. Open the Phone app.
2. Enter the code ##4636##
3. Go to the “Phone Information” tab and select “Sound settings”.

You can manually adjust the microphone gain (Mic Gain parameters) and noise reduction sensitivity (Noise Suppression), and do not increase the values above 5-6, this will lead to distortion.

Enables sound amplification during conversation

Activated mode "In the car" (if necessary)

Engineering settings checked (for advanced)

Extraneous sounds in the background are turned off-->

3. Optimization of network parameters for stable sound

Bad sound when talking is often not related to the phone, but to an unstable connection.

• 📶 Network Priority: Go to Settings → SIM-maps and mobile networks → [Yours. SIM] → Network type and select Only LTE (VoLTE provides a cleaner sound than 3G.
• 🔄 Roaming: If you are roaming, turn off Automatic Network Selection and select the operator manually.
• 📵 Flight mode: Sometimes helps to turn on and off "Flight mode" - this resets the network connection.

If you have Xiaomi with Dual support SIM, Try to change the slots. SIM-cards - sometimes the second slot has a weaker reception. Also check if the "Second" function is activated. SIM Data-based: It can conflict with voice calls.

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If you often call in places with a bad signal (metro, underground parking), turn on the SIM-card option “Enhanced Call Mode” in the settings – it automatically switches to 3G with weak LTE.

4.Firmware problems and their solution

Sometimes the sound goes bad after a MIUI update, because it's due to firmware bugs or incorrect optimization for a particular model.

• 🔄 Update rollback: If the problem appears after the update, try rolling back to the previous version via Settings → The phone. → Updating the system → Three points. → Select a Service Package.
• 🛠️ Reset Network Settings: Go to Settings → System system → Resetting settings → Reset network settings. This will delete stored Wi-Fi networks and mobile settings.
• 📲 Custom core installation: For advanced users, cores like FrancoKernel or Kirin can improve sound processing (requires an unlocked bootloader).

If you suspect the problem is firmware, check the 4PDA or XDA Developers forums, which often post patches for sound bugs. For example, the Redmi Note 11 Pro+ had a microphone bug in MIUI 14.0.3 that was fixed in 14.0.5.

⚠️ Warning: Resetting your network settings will delete all stored Wi-Fi passwords and associated Bluetooth devices!

5. Hardware malfunctions: when it is time to go to the service

If none of the software methods worked, the problem could be hardware, and here are signs that the phone needs repair:

• 🔊 Dynamics working, but sound distorted (wheezing, crackling): Probably damaged membrane speaker.
• 🎤 You can’t hear at all: the microphone is defective or the train has gone away.
• 📞 Sound disappears when the phone is tilted: Bad contact plume speaker/microphone.
• 💧 Phone fell into the water: Contacts oxidized - even if time passed after the fall.

The cost of repair in official Xiaomi services:

• Replacement of microphone: ~1 500–2 500 ₽
• Replacement of the speaker: ~2 000–3 500 ₽
• Diagnostics + purification: ~800–1 200 ₽

If your Xiaomi is still under warranty, do not open it yourself - this will void the warranty obligations.

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Before visiting the service, make a backup copy of the data - during repairs, you may need to reset the phone to factory settings.

6. Alternative solutions: Headsets and applications

If you can’t improve the sound through the settings, consider external devices and software:

• 🎧 Bluetooth Headset: Modern models (e.g. Xiaomi Buds 4 Pro) have built-in noise cancellation and provide a cleaner sound than a phone speaker.
• 🔌 Wired Headset: Even cheap headphones with a microphone often give better sound than the built-in speaker.
• 📱 Sound enhancement apps: Voice Booster amplifies voice; Hear Boost filters noise in real time. ViPER4Android (requires root – advanced sound processing.

If you use ViPER4Android, check the voice calling profiles. In the app settings, select Voice Call and activate:

• ClearAudio (sound clearing)
• ViPER DDC (Dynamic Compression)
• Convolver (for frequency correction)

For Bluetooth headsets, MIUI has separate settings: Settings → Connected devices → [Your headset] → Sound settings. You can turn on "Improving Call Quality" here.

7. Specific problems of different Xiaomi models

Some Xiaomi models have unique sound problems, and here are the most common ones:

For the POCO F3 and POCO F4, there is a well-known microphone bug when recording voice in instant messengers. The solution is to disable Sound Processing in the camera settings (yes, this affects the microphone too!).

If your model is not in the table, check the official forum Xiaomi – there are often discussed specific bugs.

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Before buying Xiaomi, check the reviews about the sound quality of a particular model – some budget devices (for example, Redmi 9A) have weak microphones by default.

FAQ: Frequent questions about Xiaomi sound