The situation when a smartphone stops making notifications or incoming calls is familiar to many owners of Xiaomi, Redmi and POCO devices. Often this is due to the accidental press of a physical button or activation of a system profile that blocks audio. Understanding exactly how the sound management system in the shell of MIUI or the new HyperOS works allows you to instantly solve the problem.
In this article, we will take a closer look at all the possible reasons why a phone might be silent, and we will look not only at the standard profile switching methods, but also at the deeper settings hidden in the feature menu.
There are several levels of audio locking, from a simple hardware switch to software constraints of Do Not Disturb mode. By understanding the hierarchy of these settings, you can flexibly manage the behavior of your device. Below are proven methods to help you get sound back to Xiaomi even in the most difficult cases.
Use of physical buttons and sidebar
The fastest way to change your sound profile is to use hardware volume keys. On most modern Xiaomi smartphones, a brief tap on the sound button causes a slider on the screen. If you click on the bell icon or gear icon in the menu that appears, additional options will open.
There's often a "No Sound" or "Vibration" switch hidden here. If No Sound is activated, the phone completely ignores incoming calls and messages without emitting a single signal. Switching to Sound or Vibration mode instantly solves the problem. In some side-finger scanner models, long-term pressing of the power button can also trigger a profile selection menu.
It is important to note that the volume button settings can activate a feature that, when you double-press the volume button, puts the phone in silent mode. You can check this in the Settings → Sound and vibration → Volume buttons. Disabling this option will prevent accidental activation of silence in the future.
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Adjust the power button action: In some versions of MIUI, a long-term press on the off button can be reassigned to a voice assistant call to avoid accidentally turning on silent mode.
Setting up sound profiles in the system menu
If physical buttons fail or are damaged, you need to go to software settings. The path to them is standard for all devices of the brand: Settings → Sound and vibration. This is where the control center for all audio streams of your smartphone is.
In this section, you'll see three main sliders: Calls and Notifications, Multimedia, and Alarms. Often users forget that No Sound mode can only be activated for one of these streams. For example, the phone can be silent when calling, but play music. Make sure the Calls and Notifications slider isn't in the extreme left position.
- 🔊 Sound mode: standard mode, all notifications are accompanied by a melody.
- 📳 Vibration mode: sound replaced by tactile recoil, the screen can flash.
- 🔇 No sound mode: completely shut down all audible signals except the alarm clock.
Special attention should be paid to the volume setting in Vibration mode. Even if the phone vibrates, the vibration force can be minimal, and you can skip the call. In advanced audio settings, you can increase the vibration intensity for incoming calls, which is especially important for people with hearing impairments.
☑️ Checking the sound settings
The Do Not Disturb Mode and Its Impact
Users often confuse the usual silent mode with the Do Not Disturb function, which is designed to block all incoming signals at a certain time or under certain conditions. If you see a crescent icon on the lock screen or in the notification curtain, then this mode is active.
Unlike a simple shutdown, Do Not Disturb mode can block even alarm clocks and recalls from contacts from a favorite list. To turn it off, just click on the appropriate icon in the notification curtain or go to Settings → Irration Sound → Do Not Disturb.
⚠️ Note: In Do Not Disturb mode, the phone can ignore calls even when the screen is unlocked, unless exceptions for selected contacts are added in the settings.
The system allows you to flexibly adjust the schedule of this mode, for example, it can automatically turn on at night or during meetings on the calendar. Check the list of scheduled events to make sure that the phone does not go into silence automatically at the wrong time.
Secret settings "Do Not Disturb"
Sound management through the control center
The MIUI and HyperOS shells offer easy access to basic functions through the control center. A swipe down from the top right corner of the screen (or top-down in older versions) opens a quick settings panel. Here is a bell icon that cycles modes: Sound → Vibration → No Sound.
Sometimes the system can stick in one of the states due to a software interface failure, in which case simply switching back and forth through the control center helps reset status, and if the bell icon is missing, it can be added through the Quick Settings Editing menu (usually the Change button or the pencil icon).
In newer versions of firmware, sound management has become more intelligent. The system may suggest turning on Do Not Disturb mode if motion sensors detect that you are asleep, or if you are in a movie theater (determined by geolocation).
| Control element | Location. | Action. | Indicator |
|---|---|---|---|
| Volume buttons | Right edge of the hull | Short press causes slider | Visual slider on the screen |
| Centre for control | Swipe top down. | Clicking on the bell icon | Change in color/shape of the icon |
| Settings menu | Settings → Sound | Slider switching | Loudness slider position |
| Power button | Right edge (optional) | Long-term pressing (if configured) | Profile selection menu |
Checking Connected Devices and Bluetooth
One of the most common and non-obvious reasons for the lack of sound is an active Bluetooth connection. If your smartphone is connected to a wireless headphone, speaker or car stereo, the entire audio stream is redirected to an external device.
Even if the headphones are lying in another room or are discharged, the phone can continue to send sound to them, creating the illusion of a broken speaker. Check the status of Bluetooth in the notification curtain. If it is active, try to turn it off or break the connection to a particular device.
- 🎧 Headphones: Check if they are automatically connected in the background.
- 🚗 Car: Some phones retain a connection to the tape recorder even after the ignition is turned off.
- ⌚ Smartwatch: Notifications can only come on the wrist if sync is enabled.
In Bluetooth settings, you can find a list of paired devices. Click on the gear icon next to the device name and select "Disable" or "Forget Device" to prevent automatic reconnection in the future.
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Always check active Bluetooth connections first if the phone speaker is working but no sound is available – this solves the problem 30% of the time.
Diagnostics and resetting of sound settings
If none of the above methods worked, it may be a software failure of system services, in which case it is recommended to perform a diagnosis. In the engineering menu Xiaomi has built-in test speakers. To run it, open the application "Phone" and type the code # # # # #6484##.
From the CIT menu that opens, select the Speaker or Receiver test to see if the hardware is working. If the test is successful but there is no sound in the system, reset the audio settings. Go to Settings → Advanced Settings → Reset and Reset → Reset your Wi-Fi, mobile network and Bluetooth settings. This will not delete your personal data, but update your network and audio configurations.
⚠️ Warning: Before performing any resets, make sure you remember passwords from your Wi-Fi networks as they will be deleted.
In extreme cases, if the problem persists after rebooting and resetting settings, you may need to update the firmware or completely reset to factory settings. → Version. MIUI/HyperOS.