The situation where Xiaomi smartphone suddenly stops making notifications or incoming calls is familiar to many users. Often this is due to the accidental switch to No Sound mode or activation of the Do Not Disturb feature, which blocks all audio signals. Owners of Redmi and POCO devices can face this at the most inopportune moment, skipping important calls or messages. Understanding the logic of how sound profiles work in the MIUI or HyperOS shell is the key to quickly solving the problem.
The Android system that underpins Xiaomi smartphones has a complex hierarchy of sound management. Soundless mode is a software constraint that completely shuts down the speaker but doesn't affect the vibration signal. Unlike media completely shutdown, this mode is specific to system events. To get the device back to normal, you need to understand the current volume settings and active profiles. Sometimes the problem lies not in the software failure, but in mechanically stuck buttons or software conflict.
In this article, we'll go into detail about all the ways to fix this problem, and we'll look at both standard methods through the settings menu and deeper system settings, and you'll learn how to schedule audio profiles so that the phone doesn't go into silent mode automatically, and we'll also touch on rare cases that require resetting audio settings or using an engineering menu.
Use of physical buttons and control panel
The most obvious and quickest way to get sound back is to use side volume buttons. On Xiaomi smartphones, a short tap on the volume button brings the slider to the screen. If the device is in no-sound mode, you'll see a crossed-out speaker. Pressing that icon or dragging the slider up usually solves the problem instantly. However, if the slider is raised but there's no sound, a separate profile may be activated.
A more advanced tool is the control center. Swipe down from the top right corner of the screen (or swipe up in older versions of MIUI) opens the quick settings panel. There's often a "no sound" or "no disturb" switch. The visual indication on the icon shows the active state. Pressing the appropriate icon deactivates silence mode. It's important to distinguish between these two concepts: the first turns off all sounds, the second only notifications, skipping calls from selected contacts.
Sometimes the system can stick in a certain state. If switching buttons doesn't help, try changing the volume of the media and then returning it back. This action restarts the audio driver in the background. It's also worth checking if Pocket mode is enabled in the settings, which can block the sound when the phone is in the bag, although it affects the screen rather than the audio.
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If the volume buttons don’t respond to presses, check if the settings include “Change the volume with buttons,” which reassigns their function in certain applications.
Set up sound profiles in the system menu
To get the audio back to the system menu, you have to go to the system menu, and the path looks like this: Settings → Sound and vibration. This is where the main controls for your Xiaomi audio behavior are. In this section, you'll see individual sliders for calling, notifications, alarm clocks and multimedia. Make sure that the Call slider is not at a minimum, as this can simulate a no-sound mode.
Within the Sound and Vibration menu, you often find "Sound Modes" or "Sound Settings" and you can select a profile: "General," "No Sound," or "Vibration." Switching the profile is a global action. If you select the "No Sound" profile, the phone ignores all incoming calls except for emergency calls. Some users accidentally activate this mode through a long press of the power button, where there is also a corresponding menu.
Some Redmi Note models and Mi flagships have options like Mi Sound or Dolby Atmos. If these functions don't work properly, they can block audio output. Try temporarily disabling all audio enhancements and checking if the sound has appeared. There may also be a mono-sound setting available, which sometimes conflicts with stereo speakers.
Below is a table describing the differences between the main audio modes in MIUI:
| Regime. | The sound of the bell | The sound of notifications | Vibration. |
|---|---|---|---|
| Common | There is. | There is. | Aye (optional) |
| No sound. | No. | No. | There is. |
| Don't disturb. | Locked down* | Locked down. | No. |
| Vibration. | No. | No. | There is. |
⚠️ Note: In Do Not Disturb mode, calls can only be made from contacts added to the Favorites list unless the appropriate setting is manually changed.
Do not disturb function and schedule
A common cause of the lack of sound is the activated Do Not Disturb (DND) function. Unlike the simple no-sound mode, DND has more flexible settings. Go to Settings → Sound and Vibration → Do Not Disturb. Here you can see if this feature is on right now. If the switch is active, the phone will ignore incoming calls and messages, creating the illusion of a speaker breakdown.
Automatic schedules are particularly dangerous. Users often forget that they set up Do Not Disturb mode from 23:00 to 07:00. As a result, the phone is silent in the morning, although the alarm (which usually works separately) rings. Check the tab "Schedule" and make sure that there are no active time slots that overlap the current time of day. Automation in MIUI works very aggressively and can be activated even when you start certain applications.
You can also set exceptions to the Do Not Disturb settings, such as allowing repeat calls: if the same number rings twice within 3 minutes, the phone will ring. This is a useful feature for emergencies. You can also allow alarm clocks and timers to run even in complete silence. Make sure that the Block All Sounds option is not activated if you want to hear the system sounds of the interface.
☑️ Regime checks Don't disturb
Control of the volume of applications and multimedia
In modern versions of Android and the MIUI shell, there is volume separation for different types of content. You can hear system clicks but not hear music, or vice versa. To manage this, use the Settings menu → Sound and vibration → Loudness (or press the volume button and select three points for advanced settings). Here you will see individual sliders for media, call, alarm and ringing over the Internet.
Sometimes a particular application may have its own audio settings that overlap the system. For example, messengers like Telegram or WhatsApp have internal notification settings. If the system has sound on and the app has “No Sound,” you won’t hear the message. Go to the settings of a particular application, look for the “Notifications” section and check if there is a restriction. The priority of notifications in Android 11 and above also plays a role: if the notification channel is marked “Silent”, there will be no sound.
There's also Monopoly Mode, or audio priority, for some games and video players. If the audio doesn't return to other apps after you quit, try restarting the audio service, you can use the developer menu or just restart the device, and in rare cases, cleaning the Settings app cache through the application management menu helps.
⚠️ Warning: Don't set the alarm to a minimum by relying on system sound.The alarm on Xiaomi has an independent volume channel that needs to be set separately.
Hidden Dynamic Settings
Specific settings for Redmi and POCO
Devices of the Redmi brands and POCO Often have additional functions in the shell. MIUI, For example, the "Ampt sound in your pocket" function may not work properly with the proximity sensor, making the phone think it's in your pocket and muting the sound of the call. → Sound and vibration → Additionally.
Another feature is the speaker mode in headphones or when connecting Bluetooth devices. If the phone "thinks" it's connected to a Bluetooth headset (even if it's off but not untied), the sound can go there. Check the Bluetooth control panel and turn off the audio transmission to external devices. Bluetooth interference is a common cause of "loss" of sound on smartphones with budget communication modules.
Some POCO firmware has a Game Turbo that can block notification sounds during a game or even after it is over if the process is not completed correctly. Check the Security → Game Turbo app and make sure that there is no notification ban for all applications. It’s also worth checking if the One-Hand mode is activated, which sometimes changes the logic of the volume buttons.
For users who like customization, it's important to know about the Sound theme. If a third-party theme is installed from the Mi Themes store, it can contain buggy audio files or scripts that block sound. Try going back to the standard Classic or Standard theme to rule out this factor. Resetting the theme often returns standard ringtones and the logic of their playback.
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Third-party themes are a common cause of software conflicts with sound, and going back to a standard theme solves the problem 80 percent of the time if the volume settings didn't help.
Diagnostics and resetting of sound settings
If none of the above methods helped remove the soundless mode on Xiaomi, there may have been a system failure. The first step should be to reboot the device. This trivial action clears RAM and restarts all system processes, including audio drivers. In 90% of software glitches, rebooting helps.
A more radical but effective method is to reset all settings to factory. A full data reset will delete all your photos, contacts and apps, so be sure to back up.Way: Settings → Phone → Settings → Resetting → Erase all data.This will put the phone back in a "out of the box" state, guaranteed to remove any software-based audio locks caused by user errors or malware.
There is also a soft reset of network and Bluetooth settings, which sometimes affects sound (especially if the problem involves wireless audio transmission). This can be done in the Settings menu → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. After this procedure, the phone will forget all networks and devices, but personal data will remain in place. This is a safe way to fix driver conflicts.