How to Check the Microphone on Xiaomi Phone: From Basic Tests to Hidden Features

The microphone in Xiaomi is like the invisible bridge between you and the outside world: call at work, record voice messages, stream TikTok or talk to Alice. But what if the person you are talking to suddenly stops hearing you and voice notes are recorded in silence? The problem can be either a software failure or a physical breakdown. Before carrying the phone to the service center, we will figure out how to independently check the microphone on Xiaomi — from the simplest methods to professional diagnostics.

In this article you will find:

• 🔍 5 Ways to Test a Microphone – From Standard Tools to Hidden Functions MIUI.
• 📱 Step-by-step instructions for Redmi models, POCO and Mi (including flagships 2023-2026).

Important: The methods in this article work on all Xiaomi smartphones running MIUI 12-14 and HyperOS, including the budget Redmi 12C and the top Xiaomi 14 Ultra. If your model is older than 2018, some menu items may differ - we will warn about this separately.

1. Quickly checking the microphone through voice recording

The easiest way to make sure the microphone works is to record the voice and play the recording, a method that requires no third-party apps to install and takes less than a minute.

How to check:

1. Open the standard Dictaphone app. If it's not on the home screen, search the system (swipe down → search bar → "Dictaphone").
2. Click on the red recording button and say a few phrases (e.g., “Mic Test One-Two-Three”).
3. Stop the recording and listen to it. If the voice is heard clearly, without wheezing or silence, the microphone is good.

⚠️ Warning: If the recording is silent or distorted, the problem may be a contaminated microphone (dust, moisture) or sensitivity settings. Before further diagnosis, wipe the microphone hole with a dry soft brush (for example, a toothbrush).

Check the cleanliness of the microphone | Make sure nothing covers the hole (cover, film) | Repeat recording in a quiet room | Check the volume of playback (may be at a minimum)

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If the record doesn’t play at all, move on to the next method – perhaps the problem is with system settings.

2. Diagnostics through the engineering menu (#4636##)

The hidden engineering mode allows you to test the hardware components of a smartphone, including the microphone, which is suitable for advanced users, as it requires caution when changing parameters.

Instructions:

1. Open the Phone app and enter the combination: ##4636##.
2. In the menu that opens, select Information (or Phone Information).
3. Scroll down to the Microphone (or Microphone) block, and this shows the signal strength in decibels (dB).
4. Say something next to the microphone, and if the band is green and the dB values change (e.g., from -50 to -10), the microphone works.

⚠️ Warning: Do not change other options in the engineering menu unless you are sure of their purpose! incorrect settings can lead to network loss or camera failure.

If the engineering menu is not available (for example, on some HyperOS firmware), use an alternative method - the CIT application (see the next section).

3. Use of the CIT (Xiaomi Test Tool) application

CIT (Xiaomi Certification Test Tool) is Xiaomi’s proprietary hardware testing app, pre-installed on most models but hidden from the user, and requires several steps to activate it.

How to launch CIT:

1. Open the Settings. → The phone.
2. Click 5-7 times in a row on the MIUI Version (or HyperOS Version) until the notification “You are a developer!” appears.
3. Return to the main Settings menu, open Additional → for developers.
4. Activate the Developer Mode switch and find the CIT (may be called the Equipment Test).
5. In the menu, select Audio → Microphone Test.

In this section you will see:

• 🎤 Primary Mic – Primary microphone (used for calls).
• 🎤 Secondary Mic – Additional microphone (for noise reduction).
• 📱 Handset Mic – speaker microphone (for hands-free communication).

For the test, press Start and speak to the microphone. If there's a green tick next to each point, it's okay. A red cross or Failed indicates a malfunction.

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4. Checking the microphone through a bell or voice assistant

If previous methods have shown that the microphone works, but the interlocutors do not hear you during the calls, the problem may lie in the settings of the network or the phone application.

Method 1: Test call

1. Call another phone (e.g. landline) or use an echo test service (e.g. *#06# on some carriers).
2. During the conversation, switch between modes: 📞 Normal mode (tube to ear). 🔊 High-profile communication. 🎧 Headphones (if connected).

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Method 2: Voice assistant

Activate Google or Alice Voice Search (if installed) and ask a question. If the assistant recognizes speech, the microphone is system-level correct. If not, check the permissions for applications in Settings → Applications → Permissions → Microphone.

Main (during calls)| Additional (noise reduction)| speakerphone |All microphones |I don't know

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5. Verification through third-party applications

If standard methods don’t give a definitive answer, use specialized apps from Google Play. They offer advanced diagnostics, including sensitivity tests and frequency analysis.

Top.-3 microphone-checker:

⚠️ Warning: When installing third-party apps, never give them permission to send them SMS or access to contacts – this can be fraudulent software. Use only proven high-ranking software (4.5)+).

If all tests show that the microphone is working but problems remain (e.g., people hear you intermittently), the reason may be:

• 📶 Bad signal network (switch to the 4G/VoLTE In Settings → SIM-maps and mobile networks).
• 🔇 Activated noise reduction (turn off in Settings) → Sound. → Improving voice).
• 🛠️ Firmware failure (try to update) MIUI last-minute).

6.What to do if the microphone is not working: a step-by-step guide

If the diagnostics show that the microphone is faulty, don't panic. 80 percent of the time, the problem is solved by software.

Step 1: Reset and reset settings

• 🔄 Restart your phone (hold the power button for 10 seconds).
• 🔧 Reset network settings: Settings → SIM-maps and mobile networks → Resetting network settings.

Step 2: Checking the physical condition

• 🔍 Look at the microphone hole (usually located at the bottom next to the connector) USB-C Make sure it's not dusty or film-covered.
• 💧 If your phone falls into water, don't turn it on -- bring it to the service right away. Corrosion can damage the microphone in hours.

Step 3: Update the firmware

Go to Settings → About Phone → System Update and install the latest version of MIUI or HyperOS. Often microphone bugs are fixed in security patches.

Step 4: Resetting to factory settings

If nothing helps, do a full reset (pre-save the data!):

Settings → About Phone → Backup and Reset → Resetting settings

Step 5: Contacting the Service

If the microphone doesn't work after all the manipulations, the reason is a hardware failure (a plume break, a microphone module fails).

• 📱 For phones on warranty – contact the official service Xiaomi.
• 🛠️ For phones over 2 years old, look for trusted workshops with good reviews. Average cost of microphone replacement: 1,500–3,000 ₽ (model-wise).

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FAQ: Frequent questions about the microphone on Xiaomi