Have you noticed that when calling on your Xiaomi, the person you are talking to is not audible and your voice is barely discernible? The problem of low volume during conversation is one of the most common among smartphone owners of this brand. The reasons can lie both in the software limitations of MIUI and in the hardware features of a particular model (for example, the Redmi Note 10 or POCO X3). In this article, we will discuss 7 proven ways to increase the volume of the microphone and the dynamics during calls, from standard settings to hidden functions of the engineering menu.
It's important to understand that a weak sound in a conversation doesn't always mean a breakdown. Often it's a product-specific problem (e.g., hearing safety standards) or a poor communication mode. We won't offer "magic" applications that "boost 200%" -- instead, we'll focus on user-validated and test-tested working methods. If the problem persists after all the manipulations, at the end of this article you'll find a checklist for diagnosing hardware malfunctions.
1. Check basic sound settings in MIUI
Before you dig deeper, make sure that the problem is not solved by standard means. MIUI 12/13/14 has several parameters that affect the volume of calls.
- 🔊 Volume Controller: Press physical volume buttons during the call, and the volume slider will appear on the screen. Make sure it is set to maximum. On some models (e.g. Xiaomi) 12T) This regulator separates the volume of the speaker and headphones.
- 📞 Voice Amplifier Mode: Go to Settings → Special facilities → Improvement of sound → Voice amplifier during a call. Turn on this setting, it automatically raises the volume of the voice of the interlocutor in noisy conditions.
- 🔄 Resetting of audio settings: Sometimes individual profile settings are lost. To reset them, go to Settings → Sound and vibration → Resetting the sound settings.
If the volume has not changed after these manipulations, the problem may lie in the network profile. For example, when using VoLTE (voice over 4G), the sound may differ from normal calls over 3G.
- Open the Settings. → SIM-maps and mobile networks.
- Choose yours. SIM-map and disable the Volte Call option (or Voice via LTE).
- Restart your phone and check the volume on a regular call.
2. Equalizer and sound effects setup for calls
There's a hidden equalizer in MIUI that can be applied to calls, and many users don't know that setting up sound effects affects not only the music, but also the voice of the person they're talking to.
Go to Settings → Sound and Vibration → Sound Quality → Equalizer. Here, choose Preset Voice or manually lift sliders in the range 100-500 Hz are the frequencies of the human voice. On models with stereo speakers (for example, Xiaomi 11T Pro), this method gives a noticeable increase in volume - up to +30% by subjective estimates.
Additional activate:
- 🎧 Adaptive sound: In the same menu, turn on Adaptive sound – the system will automatically adjust the volume to the surrounding noise.
- 🔇 Noise suppression: In Settings → Special facilities → Sound enhancement, turn on microphone noise suppression, which will reduce background noise, but may slightly lower the overall volume of your voice.
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If your model doesn’t have a Sound Quality menu, try installing the Equalizer FX app from Google Play, which allows you to set up the equalizer separately for calls, but requires root rights on some firmware.
3. Engineering menu: hidden volume settings
The most effective way to turn up the volume is to use the Engineering Mode, which is a hidden settings section where you can manually change the microphone settings and the speaker, and note: the wrong values can cause the sound to be distorted or the speakers to be damaged!
Instructions for entry:
- Open the phone app and enter the combination: ##4636##
- In the menu that appears, select Phone Information (or Testing on some models).
- Scroll down to the Audio section and press Volume.
In this menu you are interested in the following parameters:
| Parameter | Recommended value | Description |
|---|---|---|
| Sph (Microphone) | 200–230 | The microphone volume. The default value is 160-180. |
| Sph2 (Second Mic) | 180–200 | Second microphone (for noise reduction) zoom in carefully. |
| Ring (Call Volume) | 140–150 | The volume of the call, 155 at most, but it can distort the sound. |
| Media (Multimedia) | 120–130 | It doesn’t affect the phone, but it’s good for music. |
What to do if the engineering menu is not opened?
⚠️ Note: Setting values above 230 for the microphone or 150 for the speaker can cause sound distortion or even damage to the hardware, +10 to the current value and test after each change.
4.Use of third-party applications to amplify sound
If standard methods didn't work, you can use apps from Google Play, and the key is to choose those that work with calls rather than multimedia.
- 📱 Volume Booster Pro: Allows you to increase the microphone volume and speaker separately for calls. Requires permission to access phone functions. Minus: on some models Xiaomi only works after disabling battery optimization for the application.
- 🎤 Microphone Volume Booster: Specializes in microphone amplification. Effective for models with a weak second microphone (e.g. Redmi). 9A).
- 🔊 Sound Amplifier (from Google): It amplifies the sound in your headphones when you make calls. Useful if you use a headset.
Before installing, check the reviews for your model – some apps conflict with the MIUI. For example, on Xiaomi 13 Pro Volume Booster Pro can cause freezes when incoming calls. ADB-commands for manual volume setting (more on this below).
Disable battery optimization for the app|Provide all the requested permissions|Test the volume on a short call|Check out reviews for your Xiaomi model-->
5. ADB-Teams for Advanced Users
If you’re ready for more complex manipulations, ADB (Android Debug Bridge) allows you to change the system volume settings, a method that works on all Xiaomi models, but requires a connection to a computer.
Instructions:
- Install Platform Tools on your PC.
- Turn on USB Debugging on your phone (Settings → About Phone → MIUI version – press 7 times, then go back to Additional Settings → For Developers).
- Connect your phone to your PC and type in the command line: adb shell settings put system volume_music 15 Replace. volume_music on: volume_voice_call — volume; volume_mic — microphone volume; volume_system — system-sound.
Values are from 0 to 15 (maximum).
To apply the changes, restart your phone. If the command doesn't work, try an alternative method:
adb shell am broadcast -a android.media.VOLUME_CHANGED_ACTION --ei android.media.EXTRA_VOLUME_STREAM_TYPE 0 --ei android.media.EXTRA_VOLUME_STREAM_VALUE 15 --ef android.media.EXTRA_VOLUME_STREAM_PREV_VALUE 0⚠️ Attention: Changes through ADB They are reset after updating the firmware, POCO X5 Pro) MIUI can block such commands - in this case, root access will be required.
6. Checking hardware problems
If the software methods didn't work, it might be the hardware problem.
- 🔍 Speaker/microphone pollution: Dust and dirt can block sound. Clean the holes with a soft brush or compressed air. Don't use sharp objects!
- 🔌 Train damage: If the phone fell, the plume of the speaker or microphone could come off.
- 🔋 Weak contact. SIM-Cards: Poor contact can affect communication quality. SIM-card.
- 📶 Poor network coverage: In areas of weak signal, the voice may "cut." Check the network indicator during the call.
To diagnose hardware problems:
- Call from another phone and check how you can be heard.
- Connect the headphones - if they sound clear, the problem is the phone's dynamics.
- Record a voice message and listen to it, so you can understand how your microphone transmits sound.
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If the problem persists after all the manipulations, the most likely causes are a physical break in the speaker/microphone (60% of the time) or a software failure in the communication module (30%), in which case only the service center will help.
7.Alternative solutions: VoIP and external devices
If you can’t increase the volume by standard methods, consider alternatives:
- 📞 VoIP calls: Use WhatsApp, Telegram or Google Meet – these apps often have better audibility than standard phone calls.
- 🎧 Bluetooth Headset: Modern headphones (such as Xiaomi Buds 4) have built-in noise-canceling microphones, which improves the quality of conversation.
- 🔗 USB/Type-C Headset: Wired headphones with a microphone (for example, from POCO) It gives a more stable sound than the built-in speaker.
If you make frequent calls in noisy places, look for external microphones with a 3.5mm or USB-C connector. For example, Boya BY-M1 or Rode VideoMic connect to a smartphone and ensure professional sound quality. Xiaomi with a missing audio jack will require a USB-C → 3.5mm adapter.