How to turn on the microphone on the smartphone Xiaomi Redmi: from basic settings to deep diagnostics

Problems recording audio or the inability to make a voice call in the messenger often make owners of Xiaomi Redmi panic, suggesting that expensive equipment breaks. However, in the vast majority of cases, the microphone is completely functional, and the situation is caused by a software failure, changing privacy settings or banal blocking of access by a particular application. Modern shells MIUI and HyperOS pay increased attention to data security, which leads to stricter control over audio inputs.

In this article, we will take a closer look at the algorithms for turning on and configuring audio recordings on Redmi Note, Redmi and Poco smartphones, learn how to check the physical state of the device, properly configure access rights in the system, and use hidden engineering menus for deep diagnostics, and understand these processes will allow you to independently eliminate 90% of all software errors associated with sound.

Don't just bring the device to the service center if you're not listening or the voice recorder is silent. Often, just reboot the device or check if the "Do Not Disturb" mode is accidentally activated with the sound completely turned off. Let's start with basic checks that take only a few minutes, but can solve your problem.

Primary diagnostics and physical inspection of the device

Before diving into the wilds of system settings, you need to exclude the banal physical reasons for the lack of sound. Xiaomi smartphones are equipped with several microphones: the main (usually at the bottom), an additional (top for noise reduction) and built into the headset. Dirt, dust or protective film that covers the holes can completely block the sound wave.

Carefully look at the ends of your Redmi. The microphone holes are often confused with the speaker, but they are much smaller. If you use a protective case, make sure that its cutouts match the holes on the body. Sometimes even a minimal displacement of the case by a millimeter can create an acoustic stopper that makes recording impossible.

It is also worth checking the connection of external accessories. If a Bluetooth headphone or headset is connected to the phone through a 3.5 mm connector, the system automatically switches the audio input to them. If the headphones are in the bag or far away, the recording will come from their microphone, which may be closed or defective.

• 🔍 Visually inspect microphone holes for dust, pile, or moisture.
• 📱 Remove the protective case and check the microphone without it.
• 🎧 Turn off Bluetooth and remove the wired headset to check the built-in module.
• 🧹 Carefully clean the holes with a soft dry brush, without using sharp objects.

⚠️ Warning: Never use needles or toothpicks to clean the microphone. The membrane inside the device is extremely sensitive and damage to it will lead to irreversible reduction in recording quality or complete failure of the node.

After doing these simple steps, try to do a test recording using the standard Dictator app. If the sound comes up, the problem was physical. If the silence is maintained, then we move on to the software part.

Configure application access rights in MIUI and HyperOS

The most common reason the microphone doesn’t work on WhatsApp, Telegram or Instagram is because the app doesn’t have the right to do so. Android, in conjunction with the MIUI shell, requires the user’s explicit permission to use the audio input for each installed application separately.

To check and enable these rights, you need to go to the system settings. Find "Applications" or "Application Management", then select "Application Permissions". In the list that opens, find the category "Microphone". This shows all the programs that requested access to sound, divided into groups: "Always allowed", "Request" and "Not allowed".

If the application you want (like Viber or Zoom) is on the banned list, the system blocks its attempts to record sound. You have to manually change the status to "Always Allowed" or "Only in Use." Without this step, even reinstalling the application won't help.

Some versions of the firmware may have a slightly different path, and you can also go to the settings of a particular application by scrolling through the list of installed programs at the bottom of the Settings menu, and there's a separate "Permissions" item where you can point control access to the camera, microphone and geolocation.

⚠️ Warning: Be careful about allowing microphone access to unknown or suspicious applications from unreliable sources.This could lead to leaks of personal information or covert wiretapping surroundings.

After changing the settings, it is recommended to completely close the application (unload from RAM) and start it again so that the changes take effect.

Use of Rights Manager and Privacy Protection Function

Newer versions of Xiaomi’s shells include an enhanced Rights Manager that allows not only access but also see which apps have used the microphone in the background, an important tool for identifying parasitic programs that can block the main software.

Go to the Protect menu (green zipper icon) and select Privacy. Here you will find a microphone usage log. If you see an application actively using audio input while you are not using it, it can cause conflicts. The system can force the microphone to be turned off for other programs if it is engaged in a high-priority process.

Position masking and empty ID are also available in this section, but we are interested in microphone control, and make sure that important applications (calls, messengers) do not have background activity restrictions that can interrupt audio transmission.

Using these settings allows you to flexibly configure the security of your device, and if after setting up the rights in the Manager, the problem persists, it may be caused by a system error of priorities.

Diagnostics through engineering menu and testing

If standard methods fail, the hidden diagnostic tools built into Redmi's firmware come to the rescue, and the engineering menu allows you to check the hardware component of the microphone, bypassing the operating system and third-party applications, to help you determine whether the module itself is alive.

To enter the test menu, open the Phone app and type a special code. For most Xiaomi devices, the combination ##6484## works. After entering the last digit, the CIT menu will open.

In the test mode, you're going to be asked to talk to the microphone, and if you see graph surges on the screen, or if you see digital decibels changing in response to your voice, then the microphone is physically sound and the signal is coming to the board, and if the graph stays even despite the loud scream, the problem is the hardware.

• 📞 Type ##6484## in the Calling App.
• 🎤 Select Main Mic to check the bottom microphone.
• 🗣️ Talk to the device and watch the reaction of the graph on the screen.
• 🔄 Repeat the procedure for Sub Mic (top noise reduction microphone).

This method is the most reliable way to prevent a software glitch from a physical breakdown. CIT-The microphone menu works, but WhatsApp doesn’t – look for the reason in the network settings or the app account.

Elimination of software conflicts and resetting of settings

Sometimes the microphone fails because of the accumulated cache of the system or the conflict after updating the firmware, in which case it helps to clean temporary files and reset the audio settings. Don't worry, it won't delete your personal photos or contacts.

Go to Settings → Applications → All Apps. Find an app that doesn’t have a microphone. Click Memory and select Clear Cache and then Clear Data. This will return the app to “as post-installed” status while saving your accounts (but the settings inside the app will reset).

If the problem is system-like (not working anywhere), reset your network settings. Go to Settings → Connection & Sharing → Reset Wi-Fi, mobile networks, and Bluetooth. This action will restart all network modules, which often solves voice problems in VoIP services.

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Before resetting your network settings, write down Wi-Fi passwords, as the device will forget all the saved networks and require you to enter the password again.

In extreme cases, if nothing works, you can perform a full factory reset. Before that, be sure to back up your data in the Mi Cloud or on your computer. Way: Settings → About Phone → Settings → Erase all data.

⚠️ WARNING: Full reset will permanently delete all data from the smartphone's internal memory. Make sure you have an up-to-date backup of important documents and photos.

Frequently Asked Questions (FAQ)

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If the test in the engineering menu shows the microphone is serviceable, and the sound is missing in only one application, the problem is 99% in the settings of access rights or the version of the application itself.