Why Zoom doesn’t have a sound on a Xiaomi phone: A complete guide to diagnosing and troubleshooting

You walked into an important conference at Zoom, but suddenly you found that the sound was gone — the interlocutors can’t hear you, and you can hear them? This problem is especially common on Xiaomi smartphones because of the peculiarities of their software and hardware optimization. Unlike other brands, Xiaomi devices actively manage resources in the background, which can conflict with the work of voice applications.

In this article, we will explore all the possible causes of the lack of sound in Zoom on Xiaomi, from trivial volume settings to deep system conflicts. You will learn how to distinguish hardware malfunction from software failure, what MIUI settings affect the microphone and speakers, and what to do if the problem occurs only in Zoom, and in other applications the sound works normally. For convenience, we have collected unique solutions for models with Qualcomm and MediaTek processors, as well as separate instructions for devices with HyperOS (the new firmware Xiaomi 2026).

1. Check basic settings: volume, Do Not Disturb mode and permissions

Before digging deeper, make sure the problem isn't in the obvious settings. On Xiaomi, Zoom sound may be blocked because of:

• 🔇 Disabled microphone in the application itself (Mic icon crossed out).
• 📵 Do Not Disturb or Zen Mode, which silences all sounds.
• 🚫 Blocked resolutions for Zoom in the settings MIUI.
• 🔊 Zero volume for media or calls (adjusted by individual sliders).

How to check:

1. Open Zoom and tap the screen when you call, and the control panel will appear at the bottom, and make sure the microphone icon is not crossed out (if so, click on it).
2. Pull the notification curtain down and check if Do Not Disturb or Zen Mode is on. If so, turn it off.
3. Go to Settings → Applications → Application Management → Zoom → Permissions and enable access to the microphone and camera.
4. Press the volume buttons on the side of the phone and the menu will appear. Make sure that the Media slider (or Calls) is not at zero.

Important: Xiaomi with HyperOS (2026) may reset the microphone permissions after updates. If the sound is gone after the system update, restart the application and re-access.

2.Conflicts with battery optimization and background activity

MIUI and HyperOS aggressively optimize background processes, which often leads to a sound break in Zoom.The application can "fall asleep" or lose access to the microphone / speakers due to:

• ⚡ Background activity restrictions (charge saving setting).
• 🔄 Automatic Cleaning RAM (Memory Cleanup Function).
• 🛡️ Privacy protection (blocking microphone access in the background).

How to fix it:

1. Turn off battery saving: Go to Settings → Applications → Application Management → Zoom → Charge Saving and select Without Limits.
2. Add to the auto-clean exceptions: In Settings → Apps → Memory Cleanup → Exceptions add Zoom.
3. Allow background activity: In the same Zoom settings, enable AutoStart and Background Activity.
4. Check your privacy settings: In Settings → Privacy → Special Access → Access to the microphone, make sure that Zoom is allowed access at all times, not just during use.

⚠️ Warning: Some Xiaomi models (e.g. Redmi Note 12 Pro+) will have a hidden Background Microphone Limitation setting after upgrading to HyperOS. To find it, search for the settings for "background microphone" and disable the Zoom restriction.

3.Microphone problems: hardware and software malfunctions

If the sound is only lost in your head (the people can't hear them) and you hear them, the microphone is a problem.

• 🎤 Pollution of the microphone hole (dust, moisture).
• 🔌 Damage to the 3.5mm connector (if you use headphones).
• 🛠️ Failure of the microphone driver after the MIUI update.
• 📱 Hardware malfunction (for example, after a phone crash).

Diagnostics and solutions:

To check the microphone:

1. Open the standard Dictaphone app and record a few seconds. If the sound is recorded, there's a problem with Zoom.
2. Connect the headphones to the microphone, and if you hear a sound, the main microphone of the phone is malfunctioning.
3. Run your phone in safe mode (press the power button → Safe Mode). If the microphone is running, it's third-party software.

4.Discussions with speakers: why you can't hear the interlocutors

If you can't hear the other members on Zoom, but they can hear you, the problem is output. On Xiaomi, it could be because:

• 🔈 The wrong route of sound (sound goes through the speaker for conversations, not through the main one).
• 🎧 Connected Bluetooth headphones that are not active.
• 🔇 Failure in settings MIUI (e.g., Monozound mode is enabled).
• 🔊 Damage to the speaker (especially after falling or getting moisture).

Decisions:

1. Switch the sound route: During a call to Zoom, tap the screen → tap the speaker (or phone if the sound is coming through the top speaker).
2. Speaker test: Turn on music or video — if there's sound, the problem is Zoom. If not, check the speakers for physical damage.

💡

On Xiaomi 13/14 series with speakers Harman Kardon sometimes helps reset audio settings. To do this, go to Settings → Sound → Additional → Reset audio settings.

5. Features of Zoom on HyperOS (2026)

The new HyperOS firmware, released in 2026, has made changes to sound management and resolutions. If you have a Xiaomi 14, Redmi K70 or another HyperOS model, pay attention to:

• 🔒 New permission system – now microphone and camera access is requested separately for each type of connection (Wi-Fi, mobile data).
• 🔄 Automatic switching of audio devices – the system can redirect sound to Bluetooth devices.
• 🛡️ Enhanced privacy protection – background microphone access is blocked by default.

How to set up Zoom on HyperOS:

1. Allow microphone access for all networks: Go to Settings → Apps → Zoom → Permissions → Microphone and select Allow for all networks.
2. Turn off automatic sound switching: In Settings → Sound → Additional → Automatic device switching, turn off this option.
3. Add Zoom to trusted apps: In Settings → Privacy → Trusted apps add Zoom.

⚠️ Warning: HyperOS may reset the Absolute Volume setting (in Settings → Sound) after the update. If the sound in Zoom is quieter, turn this option back on.

6. Settings reset and Zoom reinstallation: extreme measures

If nothing has worked, radical methods remain:

• 🔄 Clearing the cache and data of Zoom.

Step-by-step:

1. Reinstall Zoom: Remove the app, restart the phone, and install Zoom again from Google Play.

💡

Before you reset your phone to factory settings, back up your data via Settings → About Phone → Backup. This will save your contacts, photos and app settings.

7. Hardware malfunctions: when to carry in the service

If the sound in Zoom doesn't work on any device (earphones, speaker, Bluetooth), and the problem repeats in other applications, it's probably the hardware fault.

• 🔌 Oxidation of contacts after moisture (even if the phone is not sinking).
• 🎛️ Microphone dump or speaker from board (often after falling).
• 🔊 Sound chip damage (e.g., Qualcomm WCD9385 on flagships).
• 🔋 Failure of the power controller that is responsible for supplying voltage to audio components.

How to diagnose:

1. Connect the headphones – if there is sound, the problem is with the phone’s speaker.
2. Call another phone – if the person can’t hear you, the microphone is faulty.
3. Check if the sound in the recorder records works - if not, the problem is hardware.

The cost of repairs in the service center Xiaomi:

⚠️ Warning: If the phone has been in water, DO NOT turn it on or plug it into a charger, which may cause a short circuit.

FAQ: Frequent questions about sound in Zoom on Xiaomi