Module in Xiaomi phone: understand the device, types and malfunctions

When it comes to modules in Xiaomi phones, many users think of something abstract, like a chip box or a piece that breaks. It's either taking photos, wireless charging, or connecting to other devices, POCO) Modular architecture is used everywhere, but not everyone knows how these components are arranged and what to do if they fail.

In this article, we will discuss in detail: 1. What are the modules in Xiaomi phones and what they are responsible for. 2. How to check the operability of the module (for example, a camera or a camera). NFC) 3. Typical malfunctions and whether they can be eliminated independently. 4. Where to buy original modules for replacement and how not to run into a fake.

Plus, we’ll answer common questions, such as why a Wi-Fi module can “fall off” after a fall or why the camera starts to “sprinkle” artifacts over time.

What is a module in a Xiaomi phone: a simple explanation

The module is a self-functional unit that can be replaced or repaired separately from the rest of the smartphone electronics, and imagine it as an organ in the human body, whether it's the heart, lungs or liver, each performing its own role, but when one breaks down, the whole body suffers. if the module fails NFC, You can’t pay contactlessly, but calls and internet will work.

Here are the key features of the modules in Xiaomi smartphones:

• 🔌 Standardization: In one line (say, Redmi Note 12) modules are often unified, making repairs easier.

Important: in budget models (e.g. Redmi) A2) Some modules can be soldered on boards rather than being made as separate removable units, which makes repairs more difficult and expensive.

Types of modules in Xiaomi phones: a full list with examples

Xiaomi smartphones have 10 main module types, each of which is responsible for its function, and below is a table with a description, examples of malfunctions and an average replacement cost (2026).

In addition to the listed, flagships (for example, Xiaomi 14 Pro) can be additional modules:

• 📡 5G-modem (responsible for the communication of the new generation).
• 🔋 Wireless charging module (in models with support for Qi).
• 🌡️ Temperature/humidity sensor (found in Xiaomi Mix Fold).

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If Xiaomi has stopped seeing SIM-The problem may not be in the slot, but in the modem module. Try restarting the phone in Fastboot mode and execute the command.

fastboot flash modem NON-HLOS.bin

Xiaomi

How to check the module for performance: step-by-step instructions

Before you bring your phone to the service, you can diagnose the malfunction of the module yourself.

1. Check through Settings: Go to Settings → The phone. → Diagnostics (or Equipment Test in the Engineering Menu) This shows the status of the key modules. NFC Red cross burns - chip malfunctions.
2. Use of codes: Enter in the phone app: ##4636## This will open a testing menu where you can check the camera, sensors, battery.
3. Third-party applications: Utilities like CPU-Z or AIDA64 show detailed information about the modules (e.g., camera model or battery status).

Check if the lens is covered with film or dirt|

Reboot the phone |

Update the firmware MIUI|

Try resetting the camera settings in Settings → Annexes → Camera. → Warehouse → Clear the data|

If nothing helps, test the module in the service center.-->

Warning: If you see incorrect readings when testing an accelerometer or gyroscope module (for example, the phone does not "understand" its position in space), do not rush to change the module. First check if the calibration has gone off after falling.

1. Install the Sensor Test app from Google Play.
2. Put the phone on a flat surface.
3. If the sensor readings are not zeroed, calibrate through the engineering menu (##6484###).

Typical defects of modules and their causes

According to statistics of service centers, most often Xiaomi fails:

1. Charging port – due to mechanical damage (for example, when the cable is inserted at an angle).
2. Camera module – after falls or moisture (especially vulnerable phones with a retractable camera, like Xiaomi Mi Mix 3).
3. NFC — often "flies" after unofficial firmware or reset to factory settings.

Let's take a closer look.

1. Camera module: why photos get blurred

If your Xiaomi started shooting worse than before, the reasons could be:

• 🔍 Lens contamination (dust, fingerprints).
• 💥 Phone crash – even if you can’t see anything outwardly, the autofocus module could shift.
• 📱 Software failure (for example, after updating) MIUI).
• 🔋 Overheating – at high temperature, the camera matrix can make noise".

⚠️ Warning: If the camera is not able to connect to the camera, don't try to disassemble the phone yourself. 80% of the time, the problem is solved by flashing the module through the camera. EDL-This requires a special box (for example, a UFi Box).

2. Module NFC: Why Contactless Payment Doesn't Work

If Google Pay or Mi Pay are no longer recognizing cards, check:

• 📱 Whether it's on NFC notice-curtain.
• 🔄 Is the firmware updated (in older versions) MIUI There were chip bugs NXP).
• 🛠️ Is the antenna circuit damaged (for example, after changing the screen).

Can I replace the module myself?

Theoretically yes, but in practice it depends on:

• 🔧 Phone models: in Xiaomi 12T It is easier to replace the camera than in Redmi. 9A (Modules are often soldered).
• 🛠️ Availability of tools: you will need tweezers, a hair dryer to heat up the glue, a suction cup for the screen.
• 📄 Guarantees: Self-repair voids Xiaomi warranty.

If you do, here is a step-by-step instruction on the example of replacing the Type-C module:

Turn off the phone and remove it. SIM-map|

Heat the back cover with a hair dryer (temperature 60–70)°C)|

Carefully tuck the cover with a plastic spatula|

Turn off the battery plume (to avoid short circuits)|

Seal off the old port and solder the new one (use a soldering station with a temperature of 300-350).°C)|

Check the contacts with a multimeter before assembly-->

⚠️ Note: when replacing the camera module in Xiaomi with the system OIS (Optical stabilization) recalibrate the gyroscope after installation. -n com.android.camera/.CalibrationActivity Without calibration, photos will be blurry even if the module is in good working order.

Where to buy original modules for Xiaomi?

Xiaomi’s parts market is flooded with fakes, so it’s important to know where to buy:

How to distinguish the original module from a fake?

• 🏷️ Serial number sticker – Xiaomi’s original modules always have a hologram.
• 📦 Packaging – the original comes in an antistatic package with the Xiaomi logo.

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Before buying a module, be sure to check its compatibility with your Xiaomi model. For example, the camera module from Redmi Note 11 will not work for the Redmi Note 11 Pro, even if they look the same. The exact details can be found in the disassemblies on YouTube or on the website gsmarena.com.

Frequent questions about modules in Xiaomi (FAQ)