How to flash the Xiaomi Mijia projector: official and alternative methods

Xiaomi Mijia projectors (including Mijia Laser Projector 150, Mijia Projector 2, and Mijia Projector Youth Edition) require periodic firmware updates to fix bugs, improve performance, and add new features. However, the firmware process can seem difficult for beginners: wrong actions lead to a device “brick”, loss of warranty or unstable work. In this guide, we will analyze all the current methods of firmware – from official updates over the Internet to manual restoration through the Internet. ADB.

It's important to understand that Xiaomi's projector firmware is different from the same process on the brand's smartphones or TVs, and there's no one-size-fits-all solution: it depends on the model, the current version of the software, and even the region of purchase (CN ROM) Often require additional manipulations to install global firmware (Global) ROM). We have compiled proven instructions relevant for 2026, taking into account the latest changes in the update policy of Xiaomi.

If you've never been through the hardware before, don't worry. We've detailed each step, added visual cues and warnings about typical bugs, and we've prepared a section for power users with alternative methods, including unlocking the bootloader and installing custom firmware.

1. Firmware Preparation: What to Do Before Starting

Before you start upgrading, make sure your projector is ready for the procedure. Failure to comply with these conditions can cause crashes or even breakage of the device.

• 🔋 Battery charge (for portable models) or stable power: if the projector is powered by the mains, use the original power supply. For models with a battery (for example, Mijia Projector Youth Edition), the charge must be at least 50%.
• 🌐 Internet connection: Automatic updates will require stable Wi-Fi at a speed of at least 5 Mbps. USB — Download the firmware file in advance.
• 📁 Backup settings: Xiaomi projectors do not save user settings after reset. Write down or take a picture of the current settings (brightness, color profile, connected devices).
• 🔧 Handheld tools: if you use them ADB, Prepare a computer with drivers installed and Google’s Platform Tools utility.

Pay special attention to the current firmware version. You can find it in the projector menu: go to Settings. → About the device → Write down this number, and you'll need it to select the correct update file, for example, if you have version 1.2.345 and 1.3.120 is available, you can update directly, but if the current version 2.0.100 and you're trying to install 1.5.200, it will cause an error.

⚠️ Attention: Projectors Xiaomi Mijia with prefix CN The model name is the Mijia Laser Projector 150" CN) Installing global firmware on them requires unlocking the bootloader, which cancels the warranty and may disrupt some functions (for example, Mi Home integration).

Method 1: Automatic update via the Internet (recommended method)

The easiest and safest way is to upgrade by air (OTA). It’s suitable for most users and doesn’t require technical skills. Xiaomi regularly releases updates for its projectors, fixing bugs and adding new features (like support for new streaming services or improved color rendering).

To check for updates:

1. Turn on the projector and connect it to the Internet via Wi-Fi or Ethernet.
2. Go to the menu: Settings → About the device → Updating the system.
3. Click Check Updates. If the update is available, the system will prompt you to download it.
4. Confirm the download and wait until it is completed (this can take anywhere from 5 to 30 minutes depending on the internet speed).
5. After downloading, the projector will suggest installing the update. Confirm and wait for the restart.

If the update is not available, check:

• 🔄 Region of the device: Chinese models (CN ROM) Updates are received later than the global.
• 📶 Internet stability: if the speed is below 2 Mbps, the system may not detect the update.
• ⏳ Last check: sometimes Xiaomi servers are loaded. Try again in an hour.

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If the projector does not find an update, try to change DNS-servers at 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare) in network settings, which helps in 30% of cases when the problem is related to blocking regional servers.

⚠️ Warning: If the projector is turned off or the power fails during the update load, don't panic. The next time you turn on, the system will suggest that you continue the installation. USB or ADB (see section 4).

Method 2: Manual update through USB-accumulator

If the automatic update does not work (for example, due to slow internet or regional restrictions), you can install the firmware manually through the Internet. USB-This method is also useful if the projector is not switching on normally, but is responding to the connection of the drive.

This will require:

• 🖥️ USB-format-storage FAT32 (at least 4 GB).
• 📄 Official firmware file for your model (you can download it on Xiaomi support website).
• 🔌 Cable USB-A → USB-A (plug-in).

Installation instructions:

1. Download the firmware for your model. The file should have the.zip extension and the name of the view. mijia_projector_2_global_1.5.321.zip (where 1.5.321 — Don't unpack the archives!
2. Format the flash drive into FAT32 (Use the official utility SD Formatter to avoid errors).
3. Copy the firmware file into the root directory of the flash drive (not the folder!). You don't need to rename the file.
4. Turn off the projector, insert the flash drive into the port USB (usually in the back or side).
5. Press the Menu button on the remote or projector body and hold it, turn the device on. Hold the button until the Mi logo appears.
6. Release the button – the projector will start the recovery mode and automatically find the firmware file on the flash drive.
7. Confirm installation using buttons on the remote (OK for selection, back for cancellation).

Download the official firmware from the Xiaomi website|Format the flash drive into FAT32|Copy ZIP-file-root|Do not rename the firmware file|Use the port USB projector, not remote control-->

The installation process will take 10 to 20 minutes. The projector will restart several times — don't turn it off or remove the flash drive until it's complete. Successful firmware is confirmed by the appearance of the home screen with the updated version of the software in the settings.

Method 3: Firmware through ADB (for power users)

The method is Android Debug Bridge (ADB) It's a good way to restore a projector after a failure or install custom firmware. It requires a computer and basic command line knowledge. Use this method only if other methods have failed -- incorrect commands can cause permanent damage to the system.

What you need:

• 💻 Computer with Windows, macOS or Linux.
• 🔌 Cable USB-A → USB-A (plug-in).
• 🛠️ Google Platform Tools (you can download it on the official website).
• 📄 Firmware file in.zip format (for official firmware) or.img (for customized firmware).

Step-by-step:

1. Install Platform Tools and unpack the archive into a convenient folder (for example, C:\adb).
2. Turn on the projector mode debugging on USB: Go to Settings. → About the device. Press 7 times on Build Number until the message "You're a developer" appears. Go back to Settings. → Additionally. → For developers, activate the debugging options. USB and Unlock. OEM.
3. Connect the projector to the computer with a cable USB-A → USB-A.
4. Open the command line (or terminal) in the folder with Platform Tools and execute commands in order: adb devices (serial number device should appear) adb reboot recovery (projector will reboot to recovery mode) adb sideload mijia_projector_update.zip (substitute mijia_projector_update.zip in the name of your firmware file)
5. Wait for the installation to be completed (Total xfer will appear in the command line: 1.00x).
6. Reboot the projector with the command: adb reboot

⚠️ Note: If a device not found error occurs when executing the adb sideload command, check: ADB on a computer (Windows may require manual installation through Device Manager). – Whether the original cable is used (cheap cables often do not support data transfer). - Is debugging mode on the projector enabled (after connecting to the PC, a request for confirmation of a trusted device should appear).

To install custom firmware (like LineageOS for projectors), you will need to unlock the bootloader, which deletes all data and voids the warranty. Detailed unlock instructions are shown in the spoiler below.

5. Solving typical firmware errors

Even when you follow instructions, you can get errors, and we've collected some of the most common problems and ways to solve them.

If the projector got stuck on the Mi logo after a failed firmware, try a hard reset:

1. Turn off the projector, disconnecting it from the network.
2. Press the Power button on the body for 15 seconds.
3. Connect the power and try to turn the device on again.

If this does not help, you will need to flash through Fastboot (instructions in section 4).In extreme cases, contact the Xiaomi service center, but note that after informal firmware repairs may be paid.

6. Alternative firmware: should you install custom?

Xiaomi’s official firmware is stable, but some users prefer custom builds (for example, LineageOS or other products). AOSP) for:

• 🚀 Removing Pre-Installed Applications (Bloatware).
• 🎛️ Advanced color and sound settings.
• 🔓 Bypassing regional restrictions (e.g., accessing Google Play on Chinese models).

However, custom firmware has serious shortcomings:

• ⚠️ Loss of functionality: Autofocus, trapezoid correction, or Mi Home integration may not work.
• 🛡️ Security issues: lack of regular updates from Xiaomi increases vulnerability risk.
• 🔄 Difficulty of rollback: it is difficult to return the official firmware after custom.

If you still decide to try custom firmware, follow these recommendations:

1. Check out reviews about a particular build on forums (e.g, XDA Developers).
2. Make a full backup of the current firmware through ADB or TWRP.
3. Use only firmware designed for your model (e.g. LineageOS for Mijia Projector 2).
4. Be prepared for certain functions (e.g, HDR10+ Dolby Atmos may not work properly.

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Custom firmware is only suitable for advanced users who are ready for possible stability and functionality issues. For most tasks, official updates from Xiaomi are enough.

7. How to check the success of the firmware

After updating or flashing, you need to make sure everything goes right.

1. Check the version of the software in Settings → It's got to match the version of the firmware installed.
2. Test the basic functions: 🖥️ Video playback through HDMI and embedded applications. 🔊 Sound at different volume levels (check speakers and output) 3.5 mm/HDMI ARC). 🎮 The work of the remote control and touch buttons (if any). 🌐 Connection to Wi-Fi and Ethernet.

Check the temperature of the projector after 30 minutes of operation. If it overheats (hot housing, automatic shutdown), it may not be compatible with the cooling system.

Netflix

YouTube

Google Play

Mi App Store

If you notice problems (artifacts on the screen, hanging, lack of sound), try:

• 🔄 Reset the settings to factory (Settings) → Additionally. → Resetting settings).
• 📥 Reflash the device again (possibly the firmware file was corrupted when downloaded).
• 📧 Contact Xiaomi with error logs (you can get them through the service) ADB logcat).

FAQ: Frequent questions about Xiaomi Mijia firmware