Where in Xiaomi Redmi Note 4 is the microphone: disassemble the location and check the health

Xiaomi Redmi Note 4 remains one of the most popular smartphones in the budget segment, despite the release of new models. device owners often face problems with sound during calls, recording videos or using voice assistants. The main reason is malfunction or clogged microphones. But before you carry the phone to the service, it is worth figuring out where they are located and how to check them yourself.

In this article, we will discuss in detail:

• 📍 The exact location of all microphones in Redmi Note 4 (including hidden ones)
• 🔍 How to diagnose a malfunction without special tools
• 🛠️ Possible causes of breakdown and ways of elimination at home
• 📱 Step-by-step instructions for testing with embedded and third-party applications

We will pay special attention to common mistakes that users make when searching for microphones, and give recommendations for their avoidance.

How many microphones in Xiaomi Redmi Note 4 and their purpose

Unlike the flagship models, the Redmi Note 4 is equipped with two microphones, each of which performs its function:

• 🎤 Main microphone - responsible for voice transmission during calls and recording sound in most applications (dictatorphone, voice messages.
• 📱 Noise suppressing microphone -- used to improve sound quality by suppressing external noise -- is located at the top of the speaker.

It is important to understand that some Redmi Note 4 versions (such as those with a Helio X20 processor) may have a third microphone for improved noise reduction, but this has not been officially documented.

Why does it matter? If you only lose sound while making calls, but the recorder works fine, the problem is probably the noise-canceling microphone, and if there's no sound everywhere, the main one is to blame.

Where exactly are the microphones: diagram and photo

In order not to guess on the coffee grounds, we give the exact coordinates:

• 📍 The main microphone is on the right of the microUSB connector (when you look at the phone face up), and it's hidden under the speaker grille, but it's a separate module.
• 📍 Noise-canceling microphone - to the left of the front camera, under the upper grille (near the speaker).

The photos below show the exact locations (clickable in enlarged form):

Note: Some versions of the Redmi Note 4 (e.g., for the Indian market) may have slightly different layouts, but the layout remains the same.

⚠️ Warning: Don't confuse the microphone with an infrared port, which is also located at the top of the body (right of the camera), a common mistake in self-diagnosing.

How to check the microphone on Redmi Note 4 without disassembly

Before you carry your phone to the service, perform a simple diagnosis:

1. 📞 Call another phone and see if the person you are listening to hear you, and ask them to rate the sound quality (noises, echoes, cliffs).
2. 🎤 Launch the built-in voice recorder and record 10-15 Listen to the tape, if the sound is silent or distorted, the problem is in the main microphone.
3. 🎥 Take a short video with the sound on, and if the audio track is missing or distorted, the main or noise-canceling microphone is faulty.
4. 🔊 Turn on voice search (like Google Assistant) and say a command. If the system doesn't respond, the main microphone is a problem.

For more accurate diagnosis, use specialized applications such as Microphone Test (available on Google Play).

Call and evaluate sound quality | Record voice on voice recorder | Shoot video with sound | Test voice search |Install Microphone Test-->

If all tests fail, most likely a hardware problem (mic or plume damage), and if the microphone is selective (for example, only in a recorder, but not during calls), the software is to blame.

Common causes of microphone malfunction

According to statistics of service centers, in 70% of cases, problems with microphones in Redmi Note 4 are caused by the following reasons:

• 💦 Moisture intrusion - even a small amount of water can oxidize the microphone contacts.
• 🧹 Dust clogging – microphone holes get clogged with dirt, resulting in a muffled sound, often found in users carrying a phone in their pocket.
• 🔌 Trail damage - after falls or careless disassembly, microphone contacts may move away from the motherboard.
• 🤖 Software failure - after update MIUI or custom firmware installation microphones may stop working due to driver conflict.
• 🔋 Time wear and tear - microphones have a limited resource (especially in budget phones). 3-4 They may be out of service in the year.

⚠️ Note: If you recently dropped your phone or it was in water, do not try to dry it with a hair dryer or put it in rice - this will only aggravate the problem.

Fun fact: In the Redmi Note 4, microphones are connected via a separate flexible plume that often departs when a battery or speaker is sloppy changed. If you've recently repaired your phone, that's the first reason to check.

Software Ways to Solve Problems with the Microphone

If the hardware is fine but the microphone is not working, try the following methods:

1. 🔄 Rebooting your phone is trivial, but it helps 20% of the time. Hold the power button for 10 seconds to force a reboot.
2. 📱 Resetting sound settings: Go to Settings → Sound and vibration → Reset the audio settings. Confirm the action and restart the phone.

Cleaning up the app cache

Settings → Applications → Application Management → [Select an app where the microphone does not work] → Storage → Clear the cache

Pay special attention to the phone, voice recorder and Google.

MIUI Update

Settings → About the phone → System update

Installation of an alternative application for calls

Google Phone

Phone.

If none of these methods worked, there are two options:

• 🔙 Reverse to factory firmware (but it will delete all data!).
• 🔧 Contact the service for the diagnosis of the hardware.

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Before resetting or flashing, back up your important data via Settings → Additional → Backup and Reset. This will save your contacts, messages and photos.

Hardware repair: when without service can not do

If all the software methods are exhausted and the microphone is still down, you have to intervene in the hardware.

• 🔧 Checking the microphone plume requires disassembling the phone, and if the plume has gone, it can be gently reconnected (but it requires experience and tools).
• 🧲 Replacement of microphone – a new microphone for the Redmi Note 4 near 200-400 It is important to buy an original part or a quality analogue (for example, from Huawei or Samsung with a compatible connector).
• 🔌 Cleaning contacts -- if the microphone is intermittent, it may have oxidized the contacts on the motherboard, and you can clean them with an alcohol solution and a soft brush.

Cost of repair in the service:

• Diagnosis - 300-500 rubles.
• Replacement of microphone - 800-1500 rubles (including part).
• Cleaning from moisture / oxidation - 1000-2000 rubles.

⚠️ Warning: If you've never disassembled a phone, don't try to do it yourself. In the Redmi Note 4, the plumes are very fragile, and the battery is soldered to the body - there is a great risk of damaging the board or display.

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If both microphones stopped working after the phone fell, there is a 90% chance that the plume has detached or the motherboard has been damaged, in which case self-repair is not recommended.

Frequent Diagnostic Mistakes and How to Avoid Them

Many users make the same mistakes when trying to find or fix the microphone in the Redmi Note 4.

• 🔍 You confuse the microphone with the speaker, the speaker plays the sound, and the microphone records it, and if the person you're talking to can't hear you, but you hear them, the problem is not the dynamics.
• 📱 Ignore the noise-cancelling microphone – if the main microphone is working, but during calls you hear echoes or noises, it is he who is to blame.
• 💧 Drying your phone incorrectly -- a hair dryer, rice, or battery only accelerates corrosion. If your phone is wet, turn it off immediately and take it to the service.
• 🔧 Take apart the phone without tools - plastic mediators and screwdrivers from the set - the minimum that is needed for safe disassembly.
• 🔄 Don’t test the microphone in different apps – if it doesn’t work in just one app (like WhatsApp), the problem is with it, not the phone.

To avoid these mistakes, always follow the checklist:

Make sure the problem is not in the app|Check both microphones.|Eliminate moisture|Do not disassemble the phone without experience|Make a backup copy of the data-->

FAQ: Answers to Frequent Questions