How to turn on the microphone in your Xiaomi phone: a complete guide to setting up

Modern Xiaomi, Redmi and POCO smartphones are equipped with a complex audio input management system that often puzzles users. When a person does not hear you or a voice recorder refuses to record sound, it is usually associated not with a physical breakdown, but with software restrictions or downed privacy settings. The MIUI operating system and its new version of HyperOS have tight access control, which by default can block the microphone for unfamiliar applications.

Before you take the device to the service center, you need to eliminate software errors. In most cases, the problem is solved in a few minutes by checking permissions or switching modes. Xiaomi pays special attention to data security, so the system can turn off sound recording in the background if it considers the application suspicious. Understanding the logic of these mechanisms will help you quickly return full functionality to the device.

In this guide, we will cover all the ways to activate audio input, from basic settings to using the engineering menu, how to check the physical health of the speakers and what to do if the problem is in a particular application, such as a messenger or voice recorder, and the correct diagnosis will save time and avoid unnecessary repair costs.

Basic verification of MIUI privacy settings

The first step in diagnostics should always be to check global permissions. The MIUI security system has a central control node where you can block or allow microphone access for all installed programs in one move. If you recently updated your firmware or installed an antivirus, the settings may have been lost automatically. Go to the Settings menu → Security and Security → Access to data (or "Permissions").

In the list that opens, look for the "Microphone" item, which shows all the apps that have ever requested audio recording access. Make sure the switch in front of the application you want (like Telegram, WhatsApp or Recorder) is activated. If the slider is turned off, the system blocks the sound transmission at the software level, and no other action will help.

It's worth noting that newer versions of the shell have a Privacy Protection feature that can temporarily shut down the microphone. Check the status bar, if you see a crossed-out microphone icon or an orange dot, it means that access is restricted in real time by security, and it's a security mechanism that sometimes works falsely.

If the app is not on the permission list but it requires recording the sound, try running it again. The system should automatically request permission when the function is first started. Don't ignore pop-ups by choosing "Disallow" out of habit, since you can only return access later through settings.

Configure access rights for individual applications

Often the problem is local: the microphone runs in the voice recorder, but is silent in Viber or Zoom. This indicates a conflict of access rights of a particular application. Unlike standard Android, the shell Xiaomi allows you to flexibly adjust the behavior of each installed software. For detailed configuration go to Settings → Apps → All applications.

Find a problem app on the list and click on it. In the menu that opens, select "Application Permissions." Make sure that the "Apps Permitted" box is next to "Microphone." If "Prohibited," change the value. Sometimes resetting permissions helps: select "Clear Data" (don't worry, it won't delete correspondence, only cache and access settings), and then the next run, re-confirm your hardware use.

• 📱 Recorder: Make sure that the correct sound source is selected in the settings of the recorder itself (usually the "Main microphone", not "Bluetooth" or "Hearphones").
• 🎙️ Messengers: Skype and Telegram have internal settings where you need to choose the built-in microphone of the phone, and not the headset if it is not connected.
• 🛡️ Antivirus: Third-party security programs can intercept audio control; check their privacy settings.

Special attention should be paid to video calling applications, which often require permission to use the microphone in the background so that the sound is not interrupted when you switch windows. In the application permissions menu, find the "Out-Start" option and turn it on if it is available for this software.

Using the Engineering Menu for Diagnostics

For a deeper check that excludes the influence of third-party programs, there is an engineering menu. This is a hidden part of the system, designed to test hardware components, accessed through a special code in the Phone application. Dial the combination ##6484#. If the code does not work, perhaps your firmware version blocks this input; then try entering the code ##4636## for general information.

In the CIT menu that opens, look for "Main Mic" or "Top Mic" (depending on the model, there may be several of them). When you click on the test, the system will prompt you to speak into the microphone, and then play back the recording. If you hear yourself clearly, the hardware is fine and you need to look for the problem in the software. If the sound is not there or it is badly distorted, there is a physical malfunction.

Some of the Redmi models and POCO Access to the full engineering menu may be limited, so you can use the standard Xiaomi test. Open the Services app (or Tools" → "Services"), select "Verification" SIM-maps and devices" → "Device check. Run the microphone test and follow the instructions on the screen.

Resetting sound settings and rebooting services

Temporary files and system process errors can cause audio drivers to freeze, and in this case, simply restarting your phone doesn't always help. You need to do a deeper reset of your audio settings. Go to Settings → Sound and vibration. Try changing any setting, like turning on In Your pocket mode and turning it off. This action will force you to restart the audio service.

If the problem persists, the effective method is to clear the cache of the system application Settings or Phone Manager. Go to Settings → Apps → All Apps → Settings. Click Clear → Clear cache. Don't confuse this with cleaning the data, as resetting the settings will return the phone to factory status, which is redundant in this case.

It's also worth checking if Do Not Disturb or Quiet Mode is activated, which in some scenarios can block incoming audio streams. Make sure the media volume sliders and call are not set to zero. Sometimes a software failure fixes the volume level at a minimum, and the software magnification slider does not work until a full reboot.

💡

Periodically clean the bottom hole of the microphone. It often gets clogged with dust from your pocket, resulting in a quiet sound that users mistakenly mistake for a software bug. Use a soft brush or toothbrush.

Verification of physical connections and accessories

Modern Xiaomi smartphones can automatically switch audio input when connecting external devices. If a USB-C or minijack (if any) connects headphones, a headset or even just a simple adapter, the system can consider them a priority source of sound, as a result, the conversation goes through the headphone microphone, which may be faulty or located far from your mouth.

Turn off all external accessories. If you use a Bluetooth headset, turn off Bluetooth in the notification curtain and try to make a test call. If the sound appears, then the phone just "thought" to use an external device. Check the charging connector for debris: oxidation or dust in the USB-C port can close the contacts, and the phone will mistakenly identify the connection of the headset.

A security glass or cover can also cause problems. If the film is not properly pasted and covers a small round hole (usually at the bottom or top of the case), the sound will be deaf or disappear altogether. Take off the cover and check the microphone without it. This is a banal, but very common reason for using the service.

Table: Location of microphones in different Xiaomi series

Understanding where the microphones are physically located helps in diagnosis, and depending on the model, their number and position may vary. Below is a table for the main series.

Now, notice that the hole on the back of the cameras is not always a microphone, sometimes there's a noise sensor or a flash, and the main microphone for conversation is almost always on the bottom, and it's the one that's most often affected by pollution.

💡

If the microphone shows an error in the CIT menu and cleaning and restarting does not help, it is likely that the plume or microphone module itself in the service center will need to be replaced.

Resetting to factory settings as an extreme measure

If none of the software methods worked, and the engineering test is missing sound or is running with severe distortion, it may be the file system or system files of the audio drivers. In this case, the last software method is a full reset. Remember, this step will completely delete all your data, so make sure to make a backup.

To perform the reset, go to Settings → About Phone → Settings Reset → Erase all data. The phone will reboot and start a long cleaning process. Once turned on, you will get the device out of the box. If the microphone fails to work after setting up "as new" (without installing third-party apps), the probability of hardware failure is 99%.

Sometimes blind flashing through a computer using Mi Flash helps, but it requires skill and original firmware for your particular model. If you are not sure about yourself, it is better not to take risks, as incorrect firmware can turn your phone into a brick.

⚠️ Warning: Before performing a full reset, make sure that the battery is at least 50%. Interrupting the reset process due to battery discharge can damage the system partition and not be able to turn on the phone.

Frequently Asked Questions (FAQ)

⚠️ Attention: Using compressed air to clean the microphone is dangerous.A powerful jet can damage the speaker membrane, resulting in complete loss of sound.Use only soft brushes.