Where is the microphone Xiaomi: location and maintenance

Smartphone owners often face a situation where the interlocutor does not hear a voice or recorder records a quiet sound, and immediately the question arises about the localization of the sensitive element. Understanding where the microphone is located at Xiaomi is necessary not only to diagnose communication problems, but also to properly maintain the device. Modern gadgets use a complex noise reduction system that requires multiple holes, which often confuses users looking for a single input.

The location of these elements depends on your device model, year of release and design features of the case. Engineers constantly change the design of the frames, hiding holes in inconspicuous places or masking them as antenna elements. Below we will discuss in detail all possible options for placement, methods of testing and cleaning methods that will help restore the quality of communication.

Main location: lower edge of the body

In the vast majority of cases, especially in the budget and mid-range Redmi and POCO series, the main conversation microphone is on the bottom end of the device, usually a small round hole located next to the USB Type-C or micro-USB connector, as well as a speaker, and it is through this channel that your voice is transmitted during hands-free phone conversations and when recording video to the main camera.

Often users confuse this hole with the speaker output or process hole for gluing the case. To avoid damaging the device, it is important to know that the main microphone always has a clear perforation, often covered by a fine metal mesh. In some models, such as the Xiaomi Redmi Note series, it can be shifted to one of the edges of the lower edge to minimize palm overlap during a conversation.

The bottom of the case can also include strap mounting holes or just decorative elements, so it's important not to confuse them with the acoustic input. If you notice that the sound has become deaf, first look at this area for dust, pocket pile or contact oxidation due to moisture.

⚠️ Warning: Never use sharp metal objects (needles, pins) to clean the bottom hole, as there is a high risk of piercing the microphone membrane and permanently disabling it.

Upper and rear microphones: noise reduction system

Modern Xiaomi smartphones are equipped with at least two microphones for the implementation of Active Noise Cancellation technology. The second, an additional microphone, is most often located on the upper end of the device or on the back panel near the main camera module, its main task is to capture background noise so that the processor can cut them off and leave a clear voice of the user.

If the top microphone is on the back, it often looks like a tiny black dot next to the lens or flash. In the flagship models of the Xiaomi 13 or Xiaomi 14 series, the number of microphones can reach three or four to ensure quality stereo sound when shooting video.

The top entrance is also dictated by engineering solutions for the placement of internal plumes. In some cases, the hole can be disguised as a plastic insert on the end. It is important to understand that when recording video on the front camera, the device can use the upper or rear microphone, ignoring the bottom one.

Hidden and non-standard accommodation

In pursuit of moisture protection and monolithic design, manufacturers are implementing hidden sound recording systems. In some models, the microphone hole can be integrated into the tray for the purpose of recording the sound. SIM-It's a map or a junction between the frame and the screen, which makes it difficult to visually search, but it protects the internals from water.

Special attention should be paid to models with a retractable camera or sliders, where the location of acoustic systems is often unusual. For example, in the Mi Mix series, engineers used technology to transmit sound through the vibration of the screen, where microphone holes could be carried to the bottom end in the form of a narrow slit, invisible when glanced.

To accurately determine the location in difficult cases, it is recommended to use a magnifying glass or macro shot on another phone, it is also useful to study the technical documentation or teardown reviews of a particular model on specialized resources that show the internal layout.

Diagnostics: how to check the microphone on Xiaomi

Before you can bring a phone into the service or try to disassemble it, you need to run a software diagnostic. The MIUI (HyperOS) shell has a powerful engineering menu built in to test all hardware components, including audio inputs, and this is the most reliable way to determine whether the hardware is working or if the problem is a software failure.

To start the check, dial ##64663## in your phone. The CIT (Customer Information Test) menu will open. In the list, look for "Main Mic" (main microphone) or "Sub Mic" (additional), and if you click on it, you will see visualization of the sound wave or hear your voice in the speaker if you speak into the appropriate holes.

If there is sound in the engineering menu, but there is no sound in the applications (WhatsApp, Telegram, voice recorder), the problem lies in the permission settings or the operation of a particular application. In this case, you need to check the access rights in the Settings section → Applications → Permissions → Microphone. Make sure that the desired programs are allowed to use the recording device.

Location table by popular series

To organize the information, we have compiled a summary table for the most popular smartphone lines, but remember that even within a single series (for example, the Redmi Note), the location can vary slightly from generation to generation.

Cleaning and Maintenance: Safe Methods

The most common cause of silent sound is banal pollution. Dust, mixing with skin fat, forms a dense plug that muffles the sound. To clean it is strongly recommended not to use compressed air under high pressure, as this can damage the membrane or drive dust even deeper into the body.

The ideal tool is a soft antistatic brush or a soft bristling toothbrush. Carefully, circularly, walk through the hole, first turning off the device. If the contamination is severe, you can slightly moisten the brush in isopropyl alcohol, but do not pour the liquid into the holes.

Using a sticky tape (scotch) can also be effective: glue and sharply tear off several times to pull out the surface dust.After cleaning, be sure to blow the hole with your mouth (no saliva) or use a pear to clean the optics to remove the remains of the pile.

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Use plasticine or a special cleaning mass (cleaning gel) to delicately remove dust from the speaker and microphone mesh if the brush does not help.

Software settings and sound calibration

Sometimes the problem is not solved by physical impact, but by the correct setup of the software. There is a feature called "Sound Improvement" in MIUI that can conflict with the work of the microphone in third-party applications. Try to turn off the effects in the Settings section → Sound and vibration → Sound quality.

It’s also worth checking if In-Pack mode or other smart locking features are enabled, which can limit microphone performance in certain scenarios.Resetting to factory settings (after data) often helps if the problem is caused by a software glitch after a system update.

If none of the methods worked, and the microphone is silent in the engineering menu, it is likely that a module replacement is needed.In modern Xiaomi smartphones, the bottom microphone is often soldered on the charging port plume or is part of a separate plume, which makes repairs easier.

⚠️ Warning: If the phone fell or fell into the water, even briefly, the microphone contacts could have oxidized inside the case, in which case external cleaning is useless - disassembly and an ultrasonic bath are required.

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In 80% of cases, the problem of a “quiet microphone” is solved by careful but careful cleaning of the net from pile and dust, rather than complex repairs.