Badly audible to the interlocutor when calling on Xiaomi: 12 reasons and solutions

Sound problems on Xiaomi smartphones are one of the most common complaints users have, you call a friend or colleague, and the response is silence, intermittent voice or noise so loud that you can't read words. The situation is aggravated when the problem arises spontaneously: yesterday everything worked, today the interlocutor has turned into indistinct muttering. The culprits can be hardware malfunctions (damaged speaker, oxidized contacts) and software failures - from the installed update curve to the application conflict.

This is especially common for owners of budget models Redmi and Poco, where the manufacturer saves on the quality of microphones and noise-suppressing algorithms. But the flagship Mi 13 or Xiaomi 14 are not insured, here the fault is more often experiments with custom firmware or incorrect VoLTE settings. In this article, we will analyze all possible causes, from banal (stub in the headphone jack) to exotic (conflict with Bluetooth devices), and give step-by-step instructions for diagnosing and troubleshooting.

1. Testing of speaker and microphone: mechanical causes

Before you dig into the settings, make sure that the problem is not physical damage. Start by inspecting the headphone jack — even if you don't use it, you may have accumulated debris or oxidized contacts. Put in and remove the headphones several times, sometimes it helps to clear the contact group. If the sound came up, the problem was mechanically closing.

Next, check the top speaker (which is responsible for the voice of the interlocutor during the call). Hold the phone to your ear and call another device. If there is a sound, but very quiet or distorted, perhaps the speaker is clogged with dust or damaged. Try to clean it carefully with a soft brush (do not use cotton swabs - the pile can stay inside!). On Redmi Note 10/11 and Poco X3 models, the speaker often gets clogged due to poor dust protection.

• 🔍 The speaker grid is contaminated -- muted, wheezing -- Solution: compressed air or soft brush.
• 💧 Wet, intermittent or non-intermittent sound. Solution: Dry your phone in rice or silica gel 24+ hour.
• 🔧 The plume is damaged, so it makes and goes when you move the phone.

⚠️ Warning: If the speaker cracks when the volume changes, it's a sign of a damaged membrane. Self-repair is not possible - you need to replace the module.

Remember the microphone: if the person can't hear you, not the other way around, the problem may be in the bottom microphone (main) or the top microphone (noise suppressive). Check both by recording voice messages in different applications (WhatsApp, Recorder). On Xiaomi 12T and later, it is often the top microphone that crashes due to poor soldering contacts.

2. Software failures: sound settings and firmware

If the hardware is okay, it's the software, and let's start with the basic settings.

1. Open Settings → Sound and vibration → Loudness and check the Call slider. Sometimes it resets after updates.
2. In the same menu, look for "Amprovement of Sound" (available on MIUI 13+). Activate it - this can help with a weak signal of the interlocutor.
3. Go to Settings → Special Features → Sound Improvement and turn off all options (they can distort voice).

MIUI updates don't always go smoothly. If you have a problem after an update, try:

• 🔄 Reverse to the previous version through Settings → The phone. → Updating the system → Three points. → Select a Service Package.
• 🧹 Clear the cache in Settings → Annexes → Application management → Phone. → Warehouse → Clear the cache.
• 📱 Reset network settings in Settings → SIM-maps and mobile networks → Resetting network settings.

Xiaomi models with Snapdragon 8 Gen 1/2 processor (Mi 12, 13 series) often fly the audio codec settings after upgrading to MIUI 14, which causes the voice of the interlocutor to sound like "under water", the solution is to reset all the audio settings to the factory.

Checking the volume of the call in the settings

Disabling sound improvement in special features

Clearing the cache of the phone application

Resetting mobile network settings

Verification of updates MIUI-->

3.Problems with SIM-map and mobile

The sound quality of the calls depends on the stability of the connection with the operator, so if the signal is weak or unstable, the voice will be interrupted or sound robotic.

1. Make sure that the status bar displays 4G or 5G, not 3G/E. The latter use outdated codecs with low sound quality.
2. Call your Xiaomi phone and check if the sound is lost when you move, and if so, there is a problem in the coverage area.
3. Log in Settings → SIM-cards and mobile networks → Access Point Name (APN) and compare the parameters with the official settings of your operator (they can be found on the website of Beeline, MTS, Tele2).

On Xiaomi, two SIM-Cards (Redmi Note 12 Pro)+, Poco F5) There is often a conflict of priorities. SIM Used for the Internet, and the second for calls, try to change their roles in Settings → SIM-map → Default for calls.

⚠️ If after changing the operator (for example, from MTS to Tele2) the sound is lost when calling, the problem is incompatibility of profiles. IMS. The solution is to request the new operator to send settings on SMS (usually command *123# or similar).

4. Conflicts with Bluetooth and other devices

If you use Bluetooth headphones or smartwatches, they can intercept the audio stream even when the call is going through the phone's speaker. On Xiaomi, this is especially true because of bugs in MIUI when working with Bluetooth 5.2/5.3.

• 🎧 Headphones are connected but not used – turn them off in the notification bar or in Settings → Bluetooth.
• ⌚ Smartwatches (Mi Band, Amazfit) conflict – temporarily untie them in the Mi Fitness app.
• 🚗 The car radio is Bluetooth-connected, so the call can automatically switch to it. Turn off the auto-connection in Bluetooth settings.

There is a bug on the Poco X4 GT and Redmi K50: if you activate the mode in the car during the call (through the notification panel), the sound disappears completely, the solution is to restart the phone or turn off the mode before the conversation begins.

Also check settings → Connected devices → Pre-installed audio output device. Here should be selected "phone Dynamics" and not headphones or external device.

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If the problem only occurs when you connect to a car radio, try resetting it to the factory settings, often the cache of the Bluetooth module of the tape recorder, not the phone, is to blame.

5.Castom firmware and root rights: risks to sound

Installing unofficial firmware (LineageOS, Pixel Experience) or obtaining root rights often breaks the work of audio HAL, a low-level component responsible for sound.

• The sound is only in the dynamics, but not in the headphones (and vice versa).
• There is a strong digital noise when calling.
• The microphone is working, but the interlocutor hears you through a barrel.

Solutions for custom firmware:

1. Install the right audio mod for your model (look for 4PDA or XDA Developers).
2. Check if the firmware supports VoLTE for your carrier, and if it doesn’t, the calls will go through 3G with poor quality.
3. In /system/build.prop, find the lines: ro.vendor.audio.sdkssr=false persist.vendor.audio.fluencetype=none and replace with: ro.vendor.audio.sdkssr=true persist.vendor.audio.fluencetype=fluencetype=fluencetype

If you have root, check if Magisk or Xposed is blocking system audio modules. In Magisk Manager, turn off all ViPER4Android, Audio Modification Library modules and restart your phone.

⚠️ Note: Xiaomi with MediaTek (Helio) processor G96, Dimensity 9000 custom firmware often breaks the job IMS-And that leads to calls being made, but there's no sound either way, and the only solution is to go back to the stock. MIUI.

6. Hardware malfunctions: when without service can not do

If all the software methods have been tried and the problem persists, it's a hardware breakdown.

• 🔊 The speaker doesn’t make any sounds (no music, no notifications, no calls), but the vibration works.
• 📞 The sound is only on speakerphone, but not through the top speaker.
• 🔌 After falling or getting moisture, the sound became hoarse or disappears when pressing the body.
• 🔄 The sound appears, then disappears when the phone moves (a sign of a departing plume).

The cost of repair depends on the model:

On Xiaomi with a glass back panel (Mi 11 Ultra, Xiaomi 13 Pro), repairs are more expensive due to the complexity of disassembling. If the phone is warranty, do not try to fix it yourself - this will void warranty obligations.

Alternative solutions: workarounds

If repairs are delayed, and you need to call urgently, use bypass methods:

• 📱 Use messengers (WhatsApp, Telegram, Viber) – they transmit voice over the Internet, bypassing the cellular network.
• 🔊 Turn on speakerphone and use an external speaker (if the top one isn't working).
• 🎧 Connect wired headphones – sound will go through them even if the main speaker is broken.
• 📶 Activate VoWiFi (Calls over Wi-Fi) in Settings → SIM-map → Additionally. → Wi-Fi calls.

For business users, a solution with IP-Install a Zoiper or Linphone app, register with a provider (like Sipnet or Mango Office) and make calls over the Internet, and the sound quality is higher than the cellular network, and the cost of a minute is lower.

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If the problem with sound occurs only when calling through the mobile network, but everything works fine in messengers - the operator or the hardware of the phone (communication module, antenna) is to blame.

FAQ: Frequent Sound Questions When Calling on Xiaomi