Why Xiaomi smartphone lost sound when calling: a complete guide to fix the problem

You pick up the phone and it's silent? Or you hear it, but you don't? You're more likely to hear the sound when you call Xiaomi than you think. You can have a lot of problems with the simple settings and serious hardware malfunctions. In this article, we'll look at all the scenarios that you can think of, from a random speaker to a damaged plume, and give you step-by-step instructions for each case.

It's important to understand that if the sound is lost only during calls, but it works in music, video or notifications, the problem narrows down to specific components (microphone, top speaker, telephony software settings). If there is no sound at all, it is already a system failure or hardware failure, we will help you determine what exactly you are facing and what to do next.

This article will suit owners of any Xiaomi, Redmi and POCO models, from the budget Redmi Note 10 to the flagship Xiaomi 14 Ultra. Most solutions are universal, but some older devices (such as the Redmi 4X or Mi A1) may require additional steps — we will mention them too.

1. Checking basic settings: what could have turned off by itself?

Start with the simplest: the sound may have been turned off at the software level. There are several places in MIUI where this could have happened by accident, such as when you press volume buttons during a call or through the Quick Settings menu.

The first thing to do is:

• 🔊 Make sure no sound mode is activated (the bell icon with the crossed wave in the notification panel).
• 📞 Check the volume of the speaker, which is adjustable separately from the media sound. During the call, press the volume buttons and see if the slider is at a minimum.
• 🔄 Reboot the phone. This will relieve temporary malfunctions in the telephony module (especially for devices with a mobile phone). MIUI 12-14, Where such bugs are more common).

If the sound is gone after the MIUI update, check the call settings:

1. Open the Phone app.
2. Tap it on three points (⋮) → Settings → Sounds and vibrations.
3. Make sure the Call Sound and Volume Up options are enabled (some firmwares call this Adaptive Volume).

⚠️ Attention: On devices with Android 12+ and MIUI 13+ The focus mode (in the Digital Well-Being settings) can work, which automatically turns off notification and call sounds. Check it if the problem occurs after activating this mode.

Problems with the speaker: how to determine that it broke?

If the sound is absent only during a conversation, but it works in a speaker, headphones or on speakerphone, it is most likely the upper (conversational) speaker who is responsible for the voice of the interlocutor and often fails due to:

• 💦 Moisture intrusions (even if the phone hasn’t sunk, condensation or high humidity can oxidize the contacts).
• 📱 Falls on a hard surface (the speaker is attached to the body and can move away from the board).
• 🔌 Factory marriage (especially relevant for Redmi) 9A and POCO M3, where it was a massive problem).

How to check the speaker:

1. Call another phone and put it on speakerphone, and if you have a sound, it's a problem with the speaker.
2. Hold the phone to your ear and listen: if you hear a weak crack or noise, the speaker is partially working, but needs repair.
3. Use the test code: ##6484## It runs a hardware component test (some models may not work). Select Manual Test → Receiver (or Speaker for top speaker).

⚠️ Warning: If you disassembled the phone yourself and then lost the sound, check if the speaker plume is connected to the motherboard. On Xiaomi models, it is often attached to a fragile connector that is easily damaged.

3. Software failures: from cache to firmware

If the speaker is working but there's no sound, it's the software's fault. There are a few "weak spots" in MIUI that can lead to this problem:

• 🗑️ Phone cache clogged – especially after updates.
• 🔄 Failure of the telephony module (for example, after a change of operation) SIM-maps or firmware updates).
• 📱 Conflict with installed modifications (custom firmware, patches for unlocking the network).

Step-by-step instructions for cleaning the cache:

1. Go to Settings → Applications → Application Management.
2. Find the Phone app (or Contacts on some models).
3. Slip the vault. → Clear the cache.
4. Reboot the phone.

If this doesn’t work, try resetting your network settings:

1. Settings → SIM-maps and mobile networks → Resetting network settings.
2. Confirm the action and restart the device.

For devices with MIUI 12+, there is another way - reset the settings of the Phone application:

1. Open Settings → Applications → Application Management → Phone.
2. Select additionally → Resetting settings.
3. Confirm and restart the phone.

If the problem occurs after installing custom firmware (such as Pixel Experience or LineageOS), check:

• Compatibility of the firmware with your model (for example, the firmware for the Redmi Note 9 Pro will not work for the Redmi Note 9S, despite the appearance of similarities).
• Availability of patches for the telephony module (some assemblies require additional stitching of the vendor or firmware).

4.Problems with SIM-Map and network: why the operator may be at fault?

Rarely, but it happens: the sound when calling disappears due to problems on the operator’s side or improper work. SIM-It's the way it manifests itself:

• 📵 Calls are interrupted or the sound is interrupted.
• 🔄 He hears you, but you do not hear him).
• 📶 The problem arises only with one SIM-card (if the phone is two-symbol).

How to check:

1. Try calling someone else. SIM-If the phone supports two SIMs, if the sound appears, the problem is in the first card.
2. Check the balance and status of services with the operator. Sometimes, when a negative balance or lock some functions (including sound) are turned off.
3. Put it in. SIM-If you have a problem, you can call the phone, and if you have a problem, you can call the operator.

If you are using a virtual SIM (eSIM) or SIM-support-card VoLTE/VoWiFi, try:

• Disable VoLTE in the settings SIM-Cards (sometimes this helps in firmware conflicts).
• Switch to switch to 3G-network (in Settings) → SIM-maps and mobile networks → Preferred type of network).

⚠️ Note: Some Xiaomi models (e.g. Redmi Note 8 Pro) POCO X2) There's a bug with two jobs. SIM-If you only lose sound when you have two active SIMs, try using one.

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If you have recently changed operator or activated a new one SIM-card, wait for full online registration (may take up to 24 hours) during which you may have problems with sound.

5. Hardware malfunctions: when can not do without repair?

If all the software methods have been tried and there's no sound, it's the hardware.

How to diagnose:

• 🔧 Take the phone apart (if you have experience) and check if the speaker plume is moving away. On Xiaomi models, it is usually attached next to the headphone jack.
• 🔍 Light a flashlight into the speaker grid - if moisture or corrosion is visible, cleaning is required.
• 📱 Connect headphones – if there is sound in them, and there is no sound in the speaker, the problem is precisely in the hardware part.

On the Redmi Note 8T and POCO X3 NFC, there is a frequent drop in the contacts of the speaker due to a design defect, and if your phone from this line and the sound is missing for no apparent reason, 90% of the probability that this defect is to blame.

If you're not sure about your abilities, you should contact the service. The average cost of diagnosis is 300-500. ₽, But it often goes to the credit of repairs. In official service centers Xiaomi repair warranty is possible only in the presence of physical damage (fall, moisture) - software failures are not covered by the guarantee.

Features of specific models: what breaks more often?

Some Xiaomi smartphones have "diseases" associated with sound when calling.

• 📱 Redmi Note 9/9 Pro/9S: Problems with the speaker after updating to MIUI 12.5. Decided to roll back MIUI 12 or a replacement.
• 📱 POCO X3/X3 Pro: The plume plume is dropped due to vibrations (especially when playing). Requires soldering or replacement of the plume.
• 📱 Mi 10/10T/11: Failures in VoLTE, due to which the sound disappears when switching between 4G and 3G. Helps disabling VoLTE in settings SIM-map.
• 📱 Redmi 9A/9C: Defect of the speaker (weak sound or crackling) is solved only by replacement.

For Android 11+ and MIUI 13+, there is another feature: dynamic routing of sound, sometimes the system mistakenly redirects the call sound to a non-existent device (for example, Bluetooth headphones that are already disabled) to reset this:

1. Open the settings → Connected devices.
2. Remove all stored Bluetooth devices.
3. Reboot the phone.

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If your Xiaomi is in the rain or in a wet environment, don't dry it with a hair dryer or battery! This will speed up corrosion.

7.Extreme measures: factory reset and flashing

If nothing works, then radical methods remain, and resetting to factory settings will delete all the data, but it will return the phone to its original state.

1. Save important data (contacts, photos, messages) to your computer or to the cloud.
2. Go to Settings → About the phone → Reset settings.
3. Select Reset all settings and confirm.
4. After the reboot, set the phone as new and check the sound.

If the reset doesn't work, it's still firmware, and it's a complicated procedure, but it can return sound if the problem is in a corrupted system file.

1. Download the official firmware for your model from the MIUI Download website.
2. Use the Mi Flash Tool (for Windows) or Fastboot for firmware.
3. Follow the instructions for your model (e.g., the Redmi Note 10 and POCO F3 process is different).

⚠️ Note: Fastboot Flashing deletes all data and can lock the phone if you choose the wrong firmware version.Devices with a blocked bootloader will require unlocking through the Mi Unlock Tool, which takes up to 720 hours of latency (according to Xiaomi rules).

FAQ: Frequent questions about the sound when calling on Xiaomi