Modern Xiaomi smartphones, which run on the shells of MIUI or the new HyperOS, have advanced functionality of audio tracking of user actions. One of these elements is the system sound that is played when the lock is removed from the device. For many gadget owners, this audio signal becomes intrusive, especially in situations where you need to silently activate the screen in the cinema, at a meeting or at night in the bedroom.
Xiaomi developers often hide system sounds settings deep in the menu or even hide them from standard access, which causes difficulties for users. Disabling the unlock sound not only increases the comfort of use, but in some cases allows you to save a minimum amount of battery power, saving the processor from the unnecessary task of decoding an audio file.
In this article, we will discuss in detail all known ways to eliminate this audible signal. We will look at standard methods through system settings, using the engineering menu for advanced users, and also touch on the features of the feature in the latest firmware versions. You will learn how to manage the system sounds of your Redmi or POCO at a professional level.
Standard sound and vibration settings in MIUI
The first and most obvious step for any user is to check the basic settings of the audio profile. In the MIUI shell, audio management is displayed in a separate large section, but the logic of the parameter grouping can be confusing. Unlocking sound is often tied to common system notifications or touch sounds, so finding the right switch requires careful attention.
To find the desired settings, you need to open the main menu and select Settings. Next, you need to go to the section Sound and vibration. This is where all the controls of the audio interface are concentrated. In some versions of the firmware, the desired switch may be in the subsection Additional settings or hidden inside the menu Notification Sounds.
⚠️ Attention: In the new versions of the HyperOS shell, the audio settings interface has been completely redesigned. If you do not find the switch in the specified place, try searching by settings by typing in the "system sounds" request".
Within the sound section, look for the option "Additional Sounds" or "System Sounds" -- this is where the switch is usually located, which is responsible for playing the tune when unlocked, and if this item is not on your menu, it may mean that the manufacturer of a particular device model or regional firmware version has rigidly fixed this feature.
- 🔊 Open the Settings menu and select the Sound and Vibration section.
- 🔍 Find the Additional Settings or System Sounds subsection at the bottom of the screen.
- 🔘 Turn off the switch opposite to Lock Sound or Unlock Sound.
- 📱 Check the result by blocking and unlocking the device screen.
It’s worth noting that in some cases, changing these settings may require a device reboot to take effect, because Android system services cache audio settings to make the interface work quickly.
Using the CIT Engineering Menu for Deep Customization
If standard methods fail, the CIT (Customer Integration Test) engineering menu comes to the rescue, a hidden section designed to test hardware components of a smartphone by factory engineers, but also contains advanced audio settings that are not available in normal mode, accessed through a special set of commands in the Phone application.
To enter the test mode, you need to open the standard call and type in the combination ##6484##. Once you enter the last digit, the screen will automatically switch to the test menu. Here is a list of all the components of the device. You need to find a item associated with the sound, which is often called Speaker, Audio or Sound Test.
There may be additional switches inside the test menu to control the behavior of the speakers during various system events, but be very careful: changing the parameters in the CIT can affect the performance of other audio functions, such as the volume of the call or media.
☑️ Checking before entering CIT
It's important to understand that there's no Save and Exit button in the engineering menu as you know it. All changes are instant. If you accidentally change a critical setting, you can reverse it by selecting the Exit option from the CIT menu or simply restarting the device if the output is blocked.
- 📞 Open the phone app and dial ##6484##.
- 🛠 In the test list, find the section related to audio (e.g. Speaker).
- 🔧 Look for hidden switches responsible for system interface sounds.
- 🔄 After checking, be sure to reboot the smartphone to reset the time parameters.
⚠️ Note: Do not change the settings in the menu CIT, If you're not sure what they're doing, resetting the wrong parameters can cause the speaker or microphone to lose sound.
Features of the sound switching off in HyperOS
With the release of the HyperOS shell, which gradually replaces MIUI in the global market, the menu structure has undergone significant changes, the logic of settings grouping has become more stringent, and many functions have been moved or renamed. Users who have updated from previous versions are often lost in finding familiar switches.
In HyperOS, system sound management is often integrated into the Sound and Tactile Recoil section, where developers have focused on tactile sensations, so the audio settings may be less visually visible. Unlocking sound can now be combined with a "No Sound" or "Do Not Disturb" profile, requiring customization for each use case.
In addition, the new shell has the ability to adjust audio profiles depending on the time of day or location, which means that the unlock sound can disappear automatically at a given hour, even if the main switch is activated, such flexibility allows you not to turn off the function completely, but only to limit its operation at the wrong time.
Hidden theme settings
It’s also worth mentioning that HyperOS is more likely to use cloud-based settings profiles. If you’re logged in to your Xiaomi Account, your audio settings can be synchronized from other devices, and check if system settings synchronization is enabled, which can return remote unlock sound after rebooting.
The problem of the lack of a switch in global firmware
Often users are faced with a situation where their firmware version (especially Global or EEA) physically lacks a switch for the unlock sound, which is not a bug, but a conscious decision of the regional departments of the company, which adapt the software to local preferences or legal requirements.
In such cases, the standard methods through the GUI are not possible to solve the problem. The system simply does not provide the user with the lever to control this function. The only legal and safe way to circumvent this restriction is to use third-party automated applications that can emulate the pressing of the volume buttons at the time of unlocking.
But there is a more radical method, which is to change the region of the device. Going to the Advanced Settings menu → Region and choice, for example, in India or Indonesia, can change the set of available features in the audio menu. In some regions, the presence or absence of certain system sounds is regulated by local standards.
| Region | Presence of a switch | Features | Recommendation |
|---|---|---|---|
| Russia | Often absent | Strict default settings | Use automation |
| India | Present. | Extended sound menu | Change the region temporarily |
| China | Present. | Full access to CIT | For advanced users |
| Europe (EEA) | Depends on the model. | Compliance with GDPR | Check for updates |
Changing the region is a quick procedure that doesn’t require data resets, but it can affect some system applications, such as the browser or the weather, so once the audio is set, you can revert the region back by saving the changes to the sound profile.
💡
Changing the region of the device is a secure software trick that often opens up access to hidden interface settings without the need for flashing.
Automation through macro applications
When system settings are powerless, automation tools come into the arena, like MacroDroid, Tasker or embedded in the system. MIUI Automation allows you to create complex scenarios of smartphone behavior, and with their help you can implement: → set the volume of the media/system to zero".
This method does not require a superuser (Root) right. You just need to install an automating application and create a new macro. The trigger (start condition) is the Screen Unlocked event. Action selects Volume → Set Volume, where the volume is set at 0%.
An important nuance is which type of volume to reduce, and the unlock sound can be from System, Notification or Media stream, and you need to experimentally determine which one is responsible for clicking on your device, and set the macro to control that channel.
- 📲 Install an automation application (e.g. MacroDroid).
- ⚡ Create a new macro and select the trigger Screen unlocked.
- 🔇 Add the action Volume. → Set the system volume to 0.
- ⏱ Add a second action with a 1 second delay: Restore volume to the previous level.
⚠️ Note: When using automation, make sure that the application has all the necessary permissions, including the right to change system settings and work in the background, otherwise the macro will not work after the restart.