Xiaomi phone makes strange sounds for no reason – we analyze all possible causes and solutions

You picked up your Xiaomi, and suddenly it started making incomprehensible clicks, squeaks, or even sounds that looked like interference from the radio, and there was no notification, no music playing, and there was silence in the speakers, and the situation was frightening — especially if the phone was behaving like this for the first time. 80 percent of the time the problem was solved by software, but sometimes the fault was hardware malfunctions that required the intervention of the service center.

In this article, we’ll look at all the possible causes of strange sounds in Xiaomi smartphones (including Redmi, POCO and Black Shark models), from banal system glitches to serious breakdowns. You’ll learn how to diagnose a problem yourself, which settings to check first, and when it’s time to carry the phone for repair.

1. Systemic sounds you may not have noticed

Before you panic, check if strange sounds are standard MIUI notifications. Xiaomi smartphones are known for an abundance of service signals that are easy to miss:

• 🔔 Notifications from system applications: charging sounds, low battery charge, connecting / disabling devices via Bluetooth.
• 📱 Sign and animation sounds: in MIUI there is an option of sound when unlocking, swipes and even when you press the screen (included in Settings) → Sound. → Systemic sounds).
• 🔊 Voice Assistant: If Google Assistant or Xiao is accidentally activated AI, It can make sounds even without a visible request.
• 🎵 Musical effects: some themes of design in MIUI add background melodies when interacting with the interface.

To turn off all unnecessary sounds, go to Settings → Sound and vibration and alternately check System Sounds, Notification Sounds and Touch Vibration. Pay special attention to Other Sounds, which often hide rarely used signals.

⚠️ Warning: If the phone emits short high-frequency squeaks when connected to a charge, it could be a sign of a power supply malfunction.Switch off the charger immediately and check it on another phone.

Failures in the operation of speakers and audio system

If the strange sounds are coming from the speakers (not the phone body), the problem is probably the audio subsystem.

To diagnose speakers, Xiaomi has a hidden test: dial the phone application combination ##36446337# (or #4636## → Phone information → Audio tests). If the test menu speakers are not displayed, then the problem is software (for example, a firmware failure).

Check the sound in the headphones (if the sound is clean - the problem is in the speaker)

Clean the headphone jack from dust

Turn off all Bluetooth devices

Try to play the sound in safe mode.

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Hardware malfunctions: when sounds originate from the body

If strange sounds are not coming from the speakers, but from inside the phone, this could be a sign of a serious hardware problem.

• 🔋 Battery bloating: If the phone makes squeaks or crackles when pressing the case, turn it off immediately.
• 🔌 Vibrator problems: humming or rattling when vibrating is a sign of motor wear. 4/5.
• 📱 Separation of plumes: clicks when pressed on the screen can indicate poor contact between the display and the board.
• 🔥 Short circuit: If the phone is warming and emits a hiss or crackle, immediately disconnect it from the network!

To check the vibrator, dial ##0*## in your phone and select Vibration. If the motor is uneven or with delays, it needs to be replaced. The battery is more difficult: if the phone is already off, do not try to charge it or disassemble it yourself - this is dangerous! Take it to a Xiaomi service center or an authorized workshop.

⚠️ Warning: If the phone is making a continuous high squeak even when it's off, it could be a sign of a capacitor failure on the motherboard.

4. Software failures: viruses, firmware glitches and background processes

Often, strange sounds in Xiaomi are caused by operating system failures or malware.

1. Running applications: Open Settings → Applications → Running and check if there are suspicious processes consuming resources.
2. Viruses and spyware: scan your phone through Google Play Protect or antivirus (such as Dr.Web or Kaspersky).
3. Firmware failures: If the sounds appeared after the MIUI update, try rolling back to the previous version or resetting the settings.
4. Application conflict: boot the phone in safe mode (press the power button → hold off "Stop" → "Safe Mode"). If the sounds disappear, one of the installed applications is to blame.

Pay special attention to applications with microphone and speaker access. Some programs (such as call recording or streaming services) can produce audio artifacts. To see which apps have recently used a microphone, go to Settings → Privacy → Permissions → Microphone.

5. Problems with Bluetooth, NFC and wireless modules

If strange sounds appear when connected to other devices, wireless modules may be to blame.

• 🎧 Headphone interference: If the sound is distorted only when connected via Bluetooth, try resetting the module settings (Settings) → Bluetooth → ⚙️ → Reset the settings).
• 📶 Noise when transferring data: some Xiaomi models (for example, the company’s own data, POCO F3) emit high-frequency squeak when actively transmitting data on 4G/5G. This is normal, but you can reduce the volume in the settings. → SIM-maps and mobile networks → Improved communication.
• 💳 Sounds in use NFC: If the phone is beeping when paying or reading tags, check if the antenna is damaged. NFC (It's under the back cover).

To diagnose Bluetooth problems, turn on the developer mode (Settings → About Phone → MIUI Version → 7 times press) and go to Settings → Additional → For Developers → HCI Bluetooth Journal. Here you can see the connection logs and identify crashes.

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If the sound is lost when you turn off the mobile Internet, try to manually choose a 3G network instead of 4G/5G. Sometimes interference occurs due to unstable signal of new communication standards.

6. Effect of moisture and physical damage

Even if your Xiaomi hasn't sunk, moisture or bumps can cause strange sounds.

• 💧 Oxidation of contacts: after moisture enters through 1-2 Weeks may see crackling or noise in speakers. Check the moisture indicator (usually a red mark under the tray) SIM-map).
• 🔨 Microcracks in the case: if the phone fell, check if there are gaps near the speakers or microphones – through them can penetrate the dust that causes noise.
• ⚡ Static electricity: In dry weather, when rubbed against a fabric, the phone can emit weak cods.

If the moisture indicator is working, don't turn your phone on or charge it! Put it in a silica gel bag (from a shoe box) for 24-48 hours. If the noises are not lost, contact the service. For models with official IP53 protection (for example, the Redmi Note 11 Pro), warranty repair is possible only in the absence of mechanical damage.

7. When to contact the service center?

Not all problems can be solved on your own, but here are the absolute readings for a visit to the service:

• 🔥 The phone warms and emits hissing or crackling (the risk of fire!).
• 🔋 The case is swollen, the screen moves away from the frame (a sign of a bloated battery).
• 🎛️ The sounds do not disappear even after resetting to factory settings.
• 🔊 The speaker emits a metal clang or does not work completely.
• 📵 The phone does not turn on, but makes sounds when connected to charging.

The cost of repairs in official Xiaomi services (in Russia for 2026):

⚠️ Note: If the phone is warranty, do not disassemble it yourself and do not try to repair with a soldering iron - this will void the warranty. mi.com/ru/service.

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Before visiting the service, back up your data via Settings → About Phone → Backup or Mi Cloud. After repair, the phone can be reset to factory settings.

FAQ: Frequent questions about strange sounds in Xiaomi