How to turn off the microphone on Xiaomi phone in standby mode

In an era of total digitalization, privacy issues are becoming increasingly relevant to Xiaomi owners, with users often wondering if their device is actually listening to conversations in the background, especially when the screen is off. This is not paranoia, but a legitimate concern given the number of permissions that modern apps are requesting.

Redmi and Poco smartphone owners have access to the enhanced privacy management tools built into the MIUI shell and the new HyperOS. However, standard “turn everything off” settings are often not enough to bring peace of mind.

In this article, we will discuss the technical aspects of audio sensors in sleep mode and provide a step-by-step algorithm of actions, you will learn how to physically and programmatically restrict access to the microphone to exclude unauthorized recording.

Anatomy of background microphone activity in MIUI

The Android operating system that powers Xiaomi devices has a complex resource management architecture. Even when the phone is on standby (screen is out), certain system processes can access hardware modules, which is necessary for voice assistants like Google Assistant or Xiao AI to work.

The main trigger for activating the microphone is the activator phrase. The system constantly scans the audio stream for the command "OK, Google" or "Hi, Xiaomi." This uses a special (low-power) processor mode that allows you to listen to the environment with little to no battery power.

In addition, some applications may request background recording for their functions, such as voice-messaging recorders or instant messengers, which, without proper control, can remain active even after the program is terminated.

⚠️ Warning: Complete shutdown of voice system services may result in the inoperability of voice dialing and text dictation.

Basic configuration of application permissions

The first step to security is to review access rights, and current versions of MIUI 14 and HyperOS have strict controls on the use of sensitive sensors, and you need to manually check which applications are allowed to use the microphone.

Go to the Settings menu → Protection and confidentiality → Confidentiality → Permission Manager. This is a complete list of all installed programs. Find the Microphone category and look carefully at the list.

For any suspicious app that should not hear you in standby mode (such as a calculator, flashlight or games), change access to "Disallow". The system will offer options: "Allow always", "Only when used" or "Disallow".

• 📱 Select an application with microphone access in the dispatcher list.
• 🚫 Set the "Disallow" value for unnecessary programs.
• ⏱️ Use the "Only when used" option for messengers.
• 🔍 Check for unknown apps with access to audio input.

Pay special attention to system services. Sometimes built-in features such as "In-Device Search" or "Sound Improvement" may have priority access, and disabling these features may require you to move to advanced developer settings.

Disabling voice assistants

The main consumer of standby microphone resources is the voice assistant, and to completely eliminate the possibility of background recording through this channel, you need to deactivate the command waiting function.

To disable Google Assistant, open the Google app, click on the profile avatar and select "Assistance Settings." Under "All Assistant Settings," look for "Google Assistant" and turn off the option. Now the phone will stop responding to voice commands.

If you use a proprietary Xiao AI assent (relevant to global versions with support or Chinese firmware), its settings are in the Security app or a separate assistant menu. Find the Voice Awaken switch and turn it to the Off position.

⚠️ Warning: Once voice control is turned off, you won’t be able to use OK, Google commands to quickly dial or start a timer without touching the screen.

There is also a hidden setting in Settings → Google → Settings for Google → Search and Assistant → Google Assistant → Phone. Here you can completely remove the assistant from the lock screen, which will reduce the risk of accidental activation in your pocket.

Use of "Do Not Disturb" and Profiles

While Do Not Disturb is primarily designed to block notifications and calls, its correct configuration can indirectly affect background activity.

Set up automatic Do Not Disturb mode on a schedule, such as during sleep, in which the system limits background activity of many applications, which can prevent unauthorized access to the microphone by third-party programs.

In Settings → Sound and Vibration → Do Not Disturb Mode, you can set exceptions. Make sure that no application is allowed to interrupt this mode, as this can activate the microphone to record a notification or message.

Also worth considering is creating a separate Guest profile or using a Second Space mode, so you can avoid installing apps that require access to the microphone in an isolated environment, thus creating a clean area for relaxation.

• 🌙 Set up automatic activation of the "Do Not Disturb" mode at night.
• 🔇 Stop interruptions for all applications in this mode.
• 👤 Use the "Second Space" to isolate suspicious programs.
• ⚙️ Check the behavioral advertising settings in your account MIUI.

Table: Comparison of blocking methods

For ease of choice of strategy of protection, we will give a comparative table of available methods, each of which has its advantages and disadvantages depending on your needs for functionality.

As you can see from the table, the most balanced approach is a combination of permission bans and assistants shutdowns: Flight mode ensures silence, but renders the smartphone useless for communication.

💡

Use the privacy indicator. In MIUI 13 and later, in the upper right corner of the screen, a green dot lights up if the microphone is used by any app, which is a great way to visually control.

Advanced Methods: ADB and System Limitations

For users who want to gain full control of the device, there is a method of using the Android Debug Bridge (ADB) debugging bridge, which allows you to disable system components at the packet level that cannot be removed through the standard menu.

This requires you to activate the developer mode, activate debugging over USB, and connect the phone to your computer. Using the adb shell pm disable-user --user 0 com.google.android.googlequicksearchbox command, you can completely deactivate the Google search bar, which is often responsible for listening.

adb shell pm disable-user --user 0 com.google.android.googlequicksearchbox

However, be careful: disabling critical system packages can cause an unstable interface or a cyclical reboot of the device. Always check the name of the package before turning it off.

⚠️ Attention: Use ADB A bug in the name of the package can block important system functions that will require resetting.

An alternative is to use tuning fork applications such as Access Dots (if not built-in), which not only show microphone usage, but also allow you to quickly block access for all applications with a single click of the widget.

Physical protection and shielding methods

If the software methods seem to you to be not reliable enough, there is always a physical level of protection. On modern Xiaomi smartphones, the microphones are located in different places: usually one at the bottom, one at the top and often on the back for noise reduction during video shooting.

The easiest way is to use special stub stickers for cameras, which are often thickened, and by sealing the microphone holes, you are guaranteed to prevent the sound wave from passing to the membrane.

There are also cases with design features that block access to ports and holes, and although this affects the sound quality of a conversation, in standby mode, such a case will be a great barrier.

• 🔍 Find out where all the microphones are on your model.
• 🏷️ Use micro stickers to temporarily lock holes.
• 📵 Consider using a Faraday bag for complete isolation.
• 🛡️ Buy a protective case with raised edges (raised edges).

💡

The combination of software restrictions and physical locking gives the maximum guarantee of privacy, but reduces the usability of the device.

Frequently Asked Questions (FAQ)