Background noises in the phone Xiaomi when talking: why the interlocutor hears interference and how to fix it

Have you noticed that during phone conversations on Xiaomi, the interlocutor complains about extraneous sounds - hissing, crackling or constant background noise? This is a common problem that can occur on budget models (Redmi 9A, Poco M3), and flagships (Xiaomi 13 Pro, Mix Fold 3), most often not to blame for hardware breakdowns, but software failures, incorrect settings or external interference.

In this article, we will discuss 7 main reasons why Xiaomi can thunder when talking, and give step-by-step instructions for diagnosing and fixing the problem. You'll learn how to check the microphone, configure network settings, update firmware, and even physically clean the connectors without going to the service center. FAQ answering frequent questions and table compatibility of solutions for different models.

Mikphone problems: diagnosis and cleaning

The first thing to check is the main and secondary microphones, which Xiaomi usually has two: the bottom (for conversations) and the top (for noise cancellation), and if one of them is contaminated or damaged, the interlocutor will hear background noises.

How to check the microphone:

• 📱 Run the Dictaphone app and record 10-15 seconds of silence. Listen to the recording - if you hear a hiss or a crackle, the microphone is a problem.
• 🔍 Look at the microphone hole (usually next to the connector) USB-C Visible contaminants? Carefully clean with a soft brush or compressed air.
• 🎤 Try to call in hands-free mode - if the noises have disappeared, the bottom microphone is to blame.

Attention! Do not use sharp objects (toothpicks, needles) to clean the microphone, this can damage the membrane. If after cleaning the noise remains, the microphone may malfunction (replacement is required).

2. Software failures: updates and resets

Often background noises appear after updating MIUI or installing third-party applications, for example, MIUI 13-14 firmware had bugs with talk mode audio processing.

• 🔄 Update the system: go to Settings → The phone. → Update MIUI. If a new version is available, install it.
• 📲 Reset network settings: Settings → SIM-maps and mobile networks → Reset the network settings, which will remove stored operator parameters that may conflict with the audio path.
• 🧹 Clear the cache of the phone application: Settings → Annexes → Application management → Phone. → Warehouse → Clear the cache.

Critical information: MIUI 14.0.3–14.0.6 for Redmi Note 11/12 had a noise-canceling bug that caused the interlocutor to hear an echo. Fixed in version 14.0.7 – be sure to update!

Check out the MIUI version

Make a backup copy of contacts

Record the IMEI of your phone (type *#06#)

Disable Two-Factor Authentication in Mi Account-->

3. Interference from 4G/5G and Wi-Fi networks

If a Xiaomi phone is connected to a mobile network or Wi-Fi during a conversation, electromagnetic interference can occur, especially in areas with a weak signal, when the device constantly switches between cells.

How to reduce interference:

• 📶 Turn off VoLTE (voice through) 4G): Settings → SIM-maps and mobile networks → [Yours. SIM] → Voice communications → 3G. Sometimes it dramatically improves the sound quality.
• 🌐 Put the phone in mode. 2G If the noise has disappeared, the problem is compatibility with the next generation of networks.
• 🔌 Turn off Wi-Fi while calling – some routers cause interference in the 2.4 GHz band.

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If you frequently call in places with a bad signal (metro, basement), turn on the mode Only 2G customized SIM-The sound will be cleaner, even though the speed of the Internet will decrease.

4. Application conflict: who is in the way of the microphone?

Some applications (especially those with microphone access) can block the sound path during a call.

• 🎵 Music players (Spotify, YouTube Music) in the background.
• 🎮 Voice chat games (PUBG Mobile, Free Fire).
• 🤖 Voice Assistants (Google Assistant, Alice).

How to find the culprit:

1. Go to Settings → Applications → Permissions → Microphone.
2. Sort the applications by the date of last use.
3. Disable microphone access for suspicious programs.
4. Call the test number (e.g. 112) and check if the noise has gone away.

⚠️ Attention: If you are using MIUI 14+, There's a hidden process in the system called com.miui.voiceassist that can conflict with calls. To turn it off, you have to execute a command through the phone. ADB: adb shell pm disable-user --user 0 com.miui.voiceassist 5. Physical damage: water, falls, wear If the Xiaomi phone fell, came into contact with moisture or was operated in dusty conditions, the cause of the background may be: 💧 Oxidation of microphone or speaker contacts (even after "successful" drying). 🔌 Damage to the plume connecting the motherboard to the audio module. 🔊 Rupture of the speaker membrane (hearing wheezing or distortions). How to diagnose: Shake the phone next to the ear - if you hear rolling particles, there is debris or moisture inside. Connect your headphones and call: if the noise is gone, the problem is the speaker / microphone of the phone. Check the moisture indicator (red dot under the tray) SIM-map). If it turned red, it was in contact with water. ⚠️ Warning: If the moisture indicator is working, don't turn the phone on or plug in to charge! SIM-card and battery (if removable), then contact the service. Powering oxidized contacts will aggravate the damage. What to do if the phone falls into water? 1. Turn it off without pressing the buttons. 2. Remove it. SIM-3. Wet the visible moisture with a napkin (Do not shake!). 4. Place in a silica gel bag (out of a shoe box) for 48 hours. 5. DO NOT use a hair dryer or rice - this accelerates corrosion! 6. After drying, check the microphone and speaker. If noises remain - professional cleaning is needed. 6. Sound and noise reduction settings B MIUI There are hidden audio settings that can affect the quality of the conversation, for example, when you turn on noise cancellation, sometimes you amplify the background instead of removing it. How to set up: Open Settings → Sound and vibration → Sound quality. Turn off Voice Improvement (if any). In Sound Effects, select No or Standard. For models with IR-With a blaster (Redmi Note 10 and older), turn off the Infrared port during the call - it can cause interference. For advanced users: In the engineering menu (#4636###) go to Phone Information → Set your preferred network type and set it → LTE only (if noises are 4G). Disable VoLTE → On (if echoes on VoLTE calls). 💡If the noise is still there after all the manipulations, the problem may be in the hardware, in which case only diagnostics in the service center will help, checking the microphone and audio amplifier circuits. 7. Problems on the operator's side Sometimes it is not the phone that is to blame, but the mobile operator: 📡 Overloading of the base station (during peak hours, the quality of communication decreases). 🔄 Incorrect routing of calls (especially when roaming). 📞 How to check: Call from another phone (not Xiaomi) to the same number — if there is noise, the operator has a problem. SIM-For example, if you have an MTS, try Tele2. Contact the operator to check the quality of the line. Example: Voice problems: the interlocutor hears background noise. IMEI: [yours IMEI], Model: [Xiaomi model]." Some operators (e.g. Beeline) offer free communication diagnostics. For this, dial: MTS: 0890 (Tech Support). MegaFon: 0500. Tele2: 611. FAQ: Frequent questions about the background in the phone Xiaomi 🔍 Why does the person hear an echo, not just a noise? Echoes are caused by a signal delay in VoLTE networks or when using a headset with a microphone. SIM-map. Use wired headphones without a microphone. Update the firmware to the MIUI 14.0.8+ corrected echo bugs. 📱 Can a case cause background noise? Yes! Tight covers (especially metallic ones) can: 📶 Screening the antenna, degrade the signal. 🔊 Cover the microphone hole. 🔋 Create static electricity (plastic cases). Remove the case and check the quality of the connection. If the noise is gone, replace the accessory with a thinner one. 🔧 How do you reset the sound settings to factory? Go to Settings → System and device → Resetting settings → Resetting the audio settings, which will return all the parameters (loudness, effects, noise cancellation) to the "out of the box" state! 💡 Does flashing your phone help? Yes, but only if the software problem is. For example: 🔄 If the noise has been generated after the update MIUI, A reversion to the previous version may help. 🛠️ Installing custom firmware (like the Pixel Experience) sometimes solves sound problems, but flashing it doesn't help if it's iron (damaged microphone, oxidized contacts). 📡 Could the problem be in SIM-Old or damaged. SIM-cards can be: 📞 Intermittent communication (the interlocutor hears a “teared” sound). 🔊 Background noise due to unstable network connection. Solution: Replace SIM-card for a new (better than nano-SIM) in the cabin of the operator.