Replacing the microphone on Xiaomi phone: from diagnostics to installing a new module

Mik problems on Xiaomi smartphones are one of the most common malfunctions after falls or moisture, users are faced with the fact that the interlocutor does not hear them during calls, and voice messages are recorded with interference or not recorded at all, the causes can be due to software failures, as well as physical failure of the microphone module, before carrying the phone to the service center, it is worthwhile to figure out whether you can solve the problem yourself.

In this article, we will take a detailed look at how to diagnose a microphone malfunction, what tools will be needed to replace, and give a step-by-step instruction on disassembling popular Xiaomi, Redmi and other models. POCO. We will pay special attention to the typical mistakes that beginners make when repairing, and give recommendations for choosing a quality microphone module. If you have never disassembled smartphones, do not worry: with the right approach, replacing a microphone is no more difficult than cleaning the PC system unit.

⚠️ Important: If your Xiaomi is warranty-free, self-repair will void it. In this case, it is better to contact an authorized service center. Also remember that improper disassembly can damage the plumes or motherboard - evaluate your strength soberly.

Signs of malfunctioning microphone on Xiaomi

Before you rush to disassemble the phone, make sure the hardware is the problem, and here are the key symptoms that indicate a microphone module is failing:

• 📞 Your voice cannot be heard when you are calling)
• 🎤 Voice messages in messengers (WhatsApp, Telegram) are recorded with a strong noise or not recorded at all
• 🔊 When the hands-free is turned on, the microphone does not pick up the sound (although the speakers work)
• 🤖 Google Assistant (Alice) does not respond to commands
• 📱 The sound settings display a message “Microphone turned off” or “Device not detected»

However, these same symptoms can also occur when software failures occur, such as after an update. MIUI Sometimes, you get audio settings, or you get applications that use the microphone to conflict to rule out software problems:

1.Reboot the phone - trivial, but helps in 30% of cases.

2. Check permissions for applications in Settings → Annexes → Permits → Microphone.

3. disable Bluetooth - sometimes conflicts with the main microphone.

4. Test the microphone through the engineering menu (instruction below).

If the problem persists after these manipulations, the microphone is likely to be physically damaged and needs to be replaced.

Microphone Diagnostics through Engineering Menu

To 100% confirm the malfunction of the microphone, use the hidden engineering menu (CIT). It is on all Xiaomi smartphones, but the path to it may differ depending on the version. MIUI.

Instructions for verification:

1. Open the Phone app.
2. Enter the combination: ##4636###.
3. Select Phone Information (or Testing on newer versions).
4. Scroll down to the Microphone section.
5. Speak to the microphone, the screen should show the signal level (green bars), and if they don't respond, the microphone is defective.

In some models (for example, POCO F3 Or Redmi Note 10 Pro, the engineering menu can be blocked, in which case, use third-party applications to test the microphone, for example:

• 🔧 Phone Doctor Plus (checks all sensors)
• 🎤 Microphone Test (specialized test)
• 📱 DevCheck (shows the state of hardware components)

⚠️ Warning: If the microphone shows a signal in the engineering menu, but it doesn't work in the applications, the problem may be the firmware. Try resetting to factory settings (Settings) → The phone. → Reset settings), but pre-reverse data.

💡

If the microphone works after the test in the engineering menu, but not in WhatsApp or Zoom, clear the cache of these apps in the phone settings.

Tools and parts for microphone replacement

To replace your microphone with Xiaomi, you'll need a minimal set of tools. Don't skimp on quality, cheap plastic blades can break and scratch the body.

Mandatory set:

• 🔧 Setting screwdrivers PH00 and Y00 (screw-size)
• 🪛 Plastic blades or mediators (to separate the body)
• 🧲 Screen suction cup (if you need to remove the display)
• 🔥 Hair dryer or thermo-air station (for softening glue)
• 🧴 Alcohol or isopropyl alcohol (for cleaning contacts)
• 📦 The new microphone module (must have!)

In addition (recommended):

• 🛠️ Antistatic bracelet (protection against static electricity)
• 🔍 Loop or magnifying glass (for working with small details)
• 📏 Tweezers (for careful extraction of plumes)

Where to buy a microphone for Xiaomi?

⚠️ Note: When buying a microphone, pay attention to the model number indicated on the original part. For example, a microphone with a label is suitable for the Redmi Note 9 Pro. XM-12345 (Check it out for your model! Universal microphones often have worse sound quality.

Step-by-step instructions for replacing the microphone

The process of replacing the microphone varies depending on the Xiaomi model, but the overall scheme is the same. We'll look at the universal algorithm with the Redmi Note 11, one of the most popular series, and if you have a different model, look for a disassembly on YouTube before you start work.

Step 1 Turn off the phone and remove it. SIM-map

Completely discharge the battery (up to 0%) or remove it after disassembly - this will eliminate the risk of short circuit.

Step 2. Remove the back cover.

• Heat the edge of the body with a hair dryer (temperature) ~60°C) for 2-3 minutes.
• Insert a plastic blade into the gap between the case and the screen.
• Carefully swipe the perimeter, separating the glue.

Step 3: Unscrew the screws and remove the metal plate

The screws can be of different sizes – remember where you stood, or take a picture of their location.

Step 4. Unplug the battery plume

Use tweezers or a plastic spatula to gently lift the connector. Never pull the plume, just the connector!

Step 5: Find the microphone module

Most Xiaomi models have a microphone:

• 📍 At the bottom of the phone (near the charging connector)
• 📍 Under the motherboard (requires a complete disassembly)
• 📍 Next to the main camera (on some flagships, for example, Mi 11)

Step 6. Replace the microphone

• Unplug or unplug the old microphone (depending on the type of attachment).
• Clear the contacts with alcohol.
• Install a new module and secure it.

Step 7: Collect the phone in reverse order

Make sure all plumes are tightly connected and the screws are twisted to the point (but not pulled!).

All plumes are connected.|The screws are swirling into their places.|Battery fixed.|The microphone is not closed with other details.|The body fits tightly.-->

Common Mistakes When Replacing a Microphone

Even experienced craftsmen sometimes make mistakes that lead to new breakdowns.

• 🔥 Overheating the body with a hair dryer - temperature above 70°C can damage the screen or battery.
• 🔧 Use metal tools to detach the body – they scratch the plastic and can close the contacts.
• 💧 Working in a wet room - getting moisture on the board will lead to corrosion.
• 🔌 Connect the plumes “by eye” – the wrong connection can burn the controller.
• 🧲 Ignore antistatic protection – static electricity kills microelectronics.

The most common mistake is to damage the battery plume when you disconnect, and if you accidentally tore it, the phone won't turn on until the plume is replaced (costs from 500). ₽). Many people forget to check the new microphone before installation – it happens that the part comes defective.

⚠️ If the microphone doesn’t work after the replacement, check it out:

1. Is the microphone plume connected to the motherboard correctly?
2. Are there any damages on the toll tracks (use a magnifying glass).
3. Does the new microphone match your phone’s model?

Xiaomi models with frequent microphone problems

Some Xiaomi smartphones are more prone to microphone breakdowns due to design features.-5 models that have this problem most often:

If you have one of these models, be especially careful when disassembling. For example, in the Redmi Note 8 Pro, the microphone is located next to the 3.5 mm connector, and if you sloppyly remove the audiojack, you can damage its contacts.

⚠️ Warning: Flagship models (Mi 11, Mi 12) often have multiple microphones (for noise reduction and stereo recording). If only one doesn't work, the rest can continue to function. Check each separately in the engineering menu.

Alternative solutions: if the replacement does not help

Sometimes, even after the microphone is replaced, the problem remains, and then you should consider alternatives:

• 🔄 Resetting settings to factory – sometimes helps with software conflicts.
• 📱 Using an external microphone through USB-C Bluetooth.
• 🔧 Flashing the phone to clean MIUI (via Fastboot).
• 🛠️ Diagnostics of the motherboard - perhaps a problem in the audio codec.

If you suspect that the problem is in the audio codec (the chip responsible for processing sound), it will cost between 2000 and 5000. ₽ In this case, it's cheaper to sell the phone for parts and buy a new one.

For a temporary solution, you can use a Bluetooth headset or USB-A microphone, for example, Xiaomi Mi AIoT Router AX3600 supports the connection USB-devices, and under certain settings, you can output sound through it.

💡

If the problem remains after replacing the microphone, check the power circuit on the motherboard - sometimes resistors or capacitors near the audio codec burn out.

FAQ: Frequent questions about replacing the microphone with Xiaomi