How to remove the microphone lock in the phone Xiaomi

Many Xiaomi, Redmi and POCO smartphone users face the uncomfortable situation of an app not recording sound or not hearing you while talking. Most often, the problem is not a physical breakdown, but a software lock that can be fixed on its own. Modern versions of the MIUI shell and HyperOS have multi-step privacy protection system that sometimes works too aggressively.

In this article, we will look at all the possible reasons why a microphone might be locked, and provide a step-by-step guide to how to restore it. You will learn how to configure access rights for specific programs, check system limitations, and diagnose hardware. Recovery will take only a few minutes if you act consistently.

Diagnostics of the problem: software or hardware

Before you go into deep settings, you need to understand the nature of the malfunction, because if the microphone is locked software, in most cases it only affects one application or group of applications, for example, the recorder can work, and Telegram can not. In the case of hardware failure, the sound will not be recorded anywhere, including a standard recorder and video recording.

The easiest way to do that is to run a standard Dictophone app and record a short piece of speech, and if the recording is clean and clear, the microphone is in good shape, and the problem is with access rights settings or software conflict, and if you hear a crack, silence, or recording breaks, you should check for physical contamination.

⚠️ Warning: If, after resetting all settings and checking in safe mode, the microphone still does not work in any application, there is a high probability of failure of the plume or the module itself.

And you should also look at the privacy indicator. In modern versions of Android, when you're using the microphone at the top right of the screen, the green dot lights up. If you're talking but there's no point, the app doesn't have access to the hardware. If the dot is on all the time, even when you're not doing anything, maybe there's spyware or a virus in the background.

Setting access rights in the application menu

The main reason the microphone doesn’t work in a particular app (like Viber or Instagram) is because it doesn’t have permission to do so. MIUI requires explicit confirmation from the user for every action related to personal data. Without that permission, the app simply won’t be able to “hear” you.

To verify and enable access, follow the following steps:

• 📱 Go to Settings and select "Applications».
• 🔍 Find a problem app on the list (such as WhatsApp).
• 🔒 Click on "Application Permissions».
• 🎙️ Find the Microphone and select “Allow” or “Always Allow».

In some cases, the system may offer a “Time Only” option, which is the most secure option from a privacy perspective, but it only guarantees sound when the app is open on the screen. For instant messengers that need background voice messages, it is better to choose full access if this option is available on your version of the OS.

It is also important to check whether the limit on “AutoStart” is worth it. If the application is not allowed to run in the background, it may not activate the microphone when an incoming call is over the Internet. This setting is located in the same menu, under the “Battery” or “AutoStart”.

System access rights monitor

There is a separate tool for global privacy management in MIUI that takes precedence over settings for individual applications, and if it's a ban, no other manipulations can help, and this section allows you to turn off the microphone for the entire system or specific programs in one move.

To enter this section, you need to open the Security app (green zipper icon) that is preinstalled on all Xiaomi smartphones. The bottom menu or tool list should look for Privacy Protection or Permission Monitor, and here you can see the summary statistics of what apps and how often you used your microphone over the past 24 hours.

Inside the Permission Monitor, look for the Microphone category, and you'll see a list of all the programs that have ever requested audio access. Make sure the switch next to the app you want is active (blue or green). If it's turned off, the system blocks any attempts to record sound at the core level.

💡

Check your microphone usage history from time to time in this menu – if you see an app that you haven’t used in a long time, it could be a sign of a data breach.

Application conflicts and background processes

Android is designed so that only one or two applications can use the microphone at a time (depending on the OS version and manufacturer). If you are talking on a regular cellular connection, and in the background Zoom or voice recorder is running, the system can block access to the second application, giving an error.

A common reason for blocking is the “optimizers” and “cleaners” of memory of third-party developers, which can aggressively terminate the processes responsible for audio input, or, conversely, prevent the release of the microphone resource after the completion of another program, it is recommended to remove such utilities and use the built-in tools Xiaomi.

It’s also worth checking if Do Not Disturb mode or special audio profiles are enabled. In some use cases (such as “Meeting” or “Cinema”), the phone can programmatically jam incoming sounds or block voice transmission so as not to disturb the silence.

Diagnostics through engineering menu and tests

If the software settings are fine, but the sound still doesn't pass, you can use the hidden engineering menu to check the hardware part, which is a deeper level of diagnostics that allows you to bypass the standard interface and check the microphone response directly.

To enter the Xiaomi engineering menu, use the following code in the Phone app:

##6484##

Once you enter the code, the CIT (Customer Interface Test) menu will open, and you'll need to find the item associated with the microphone in the test list, which can be called Main Mic, Sub Mic, or simply Microphone.

The window that opens usually asks you to press the Start button and say something. If the volume jumps on the screen (the green scale moves) and you hear your voice in the speaker (if the echo is on), then the hardware is good. If the scale is at zero, the problem is physical.

Hardware causes and physical blockage

And physical factors are also important, and people often buy new cases that cover the microphone or skewed protective glass, which may be invisible, but the acoustic channel is completely blocked.

Another common problem is pollution: the microphone nets on Xiaomi are quite small and quickly clogged with dust, pocket pile or earwax. Cleaning should be done carefully: use a soft dry toothbrush or sticky tape. It is strictly forbidden to use sharp objects (needles, pins) or blow with your mouth (humid air condenses inside).

⚠️ Warning: Never use alcohol or aggressive chemicals to clean microphone nets directly on the case.The fluid can penetrate and oxidize the contacts, leading to irreversible breakage.

Also check if the headphone jack (if any) has oxidized. In some models, when moisture enters the 3.5mm connector, the system thinks that the headset is connected with a microphone, and switches the audio input to it. Since there is no headset, there will be no sound. Try inserting and removing the headphone plug several times or cleaning the connector.

Resetting and software update

If none of the above methods worked, you may have accumulated critical configuration file errors, in which case resetting to factory settings will help. Remember, a full reset (Wipe Data) will delete all your photos, contacts and applications, so make sure to make a backup.

Before drastic measures, try updating your system. Often, problems with sound drivers are fixed in security patches. Go to Settings → About Phone → MIUI/HyperOS version and check for updates. If you have firmware beta installed, consider returning to a stable branch.

In extreme cases, even if the microphone does not work after reset, you will need to flash the device through the computer using the Mi Flash Tool utility. However, if this does not help, it is necessary to replace the charging module (where the main microphone is often soldered) or the plume in the service center.

💡

If the reset to factory settings did not eliminate the problem, the probability of a software error is close to zero - diagnostics are required in the service center.

Frequently Asked Questions (FAQ)