Xiaomi Mijia G1 firmware: official and alternative methods of updating

Introduction: Why upgrade to the Xiaomi Mijia G1?

Smart projector Xiaomi Mijia G1 — It is a popular device for home theater, but its capabilities directly depend on the firmware version. The manufacturer regularly releases updates that fix bugs, add new features (such as Dolby Vision support or improved color reproduction) and optimize the work with Mi Home and Google Assistant services. The projector "hangs" on the logo, does not see USB-The flash drive or the error is Update failed.

In this article, we will discuss all the current ways of firmware Mijia G1 — From official upgrades via Wi-Fi to manual recovery via ADB. You will learn how to avoid errors, which firmware files to download (and where to get them), and what to do if the projector stopped turning on after a failed update. G1: locking the loader on firmware older than 2023, which requires additional action in downgrade.

Preparation for firmware: what to do before the start

Before you start the upgrade, make sure your Xiaomi Mijia G1 is ready for the procedure.Neglecting preparation is the main reason for the "bricking" of devices.

• 🔋 Battery charge (if portable): at least 50%. When connected to the network, use the original power adapter.
• 📡 Stable Internet connection (for air updates): speeds from 10 Mbps, without interruptions.
• 💾 USB-(for manual firmware): formatted in FAT32, up to 32 GB.
• 🔧 Backup settings: Save current image, sound, and network settings (e.g. by taking pictures of menu screens).

For manual firmware, download the official firmware file only from Xiaomi (support section for Mijia G1). Avoid third-party sources - risk running into modified (and potentially dangerous) versions. Pay attention to the firmware version: if your current version is newer than the one you're trying to install, you may need to unlock the bootloader.

⚠️ Attention: On the firmware of Mijia G1 version 1.4.50+ Xiaomi has implemented rollback protection on older versions. Attempting to downgrade without unlocking will lead to an error Anti-rollback check fail and require authorization through the Mi Account.

Method 1: Air-to-air update (OTA) is the easiest method

If your Xiaomi Mijia G1 is connected to the Internet, it should automatically check for updates, but sometimes the notification of a new firmware does not come.

1. Go to Settings → About the device → System update.
2. Click Check for updates.
3. If an update is found, confirm the installation and wait for the reboot.

It takes 10 to 30 minutes depending on the speed of the Internet, the projector will reboot several times, which is normal, do not turn off the power until it is completely complete (the indicator on the case should burn green).

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If the update is “hanging” at the boot stage, try changing it. DNS-server in network settings at 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare).

If OTA-Update is not working, possible reasons:

• 🌍 Regional restrictions: firmware can only be available to certain countries (e.g. China or the EU).
• 🔄 Server problems: check the status of Xiaomi servers at status.mi.com.
• 📱 Linking to Mi Account: some firmware requires authorization to install updates.

Method 2: Manual update through USB-accumulator

If OTA Does not work or you want to install a specific version of the firmware, use USB-This method is suitable for recovery from failures or installation of beta versions.

Step 1: Preparation USB-storage

Download the official firmware file for Mijia G1 (.zip extension) and follow the following steps:

Download the firmware from the official website|Check the checksum (MD5) file|Format USB into FAT32|Copy ZIP-file to the root of the drive (without folders)|Safe to extract USB PC-->

The name of the firmware file must match the model, for example, for a global version, it could be mijia_g1_global_1.5.67.zip. Don't unpack the archives!

Step 2: Install firmware through the recovery menu

1. Turn off the projector and insert USB-portable.
2. Press the Menu button on the remote and the power button on the case simultaneously for 5-7 seconds until the recovery menu appears.
3. Select Update via USB (use volume buttons for navigation, power button for confirmation).
4. Confirm the installation and wait until the projector is completed (reboot automatically).

⚠️ Warning: If the projector is no command error or hangs on the logo after the reboot, it means that the firmware file is corrupted or not suitable for your model.

Method 3: Firmware through ADB (for power users)

The Android Debug Bridge (ADB) method is suitable for custom firmware installation or system bug debugging, requiring a PC with drivers installed and USB debugging enabled on the projector.

Step 1: Set up a PC and projector

Download and install:

• 🖥️ ADB Fastboot Tools by Google.
• 🔌 Drivers for Xiaomi Mijia G1 (can be found on the forums XDA Developers or 4PDA).

On the projector, activate the Developer Mode:

1. Go to Settings. → About the device.
2. Click 7 times on the Build Number until the "You are a developer" notification appears.
3. Return to Settings → Additional → For developers and enable USB debugging.

Step 2: Install firmware through ADB Sideload

Connect the projector to the PC through USB-cable (use the port) USB 2.0 on PC for stability) and execute commands in the terminal:

adb devices

(The Mijia G1 device with serial number must be displayed.)

adb reboot recovery

(The projector will reboot in the recovery menu.)

adb sideload mijia_g1_global_1.5.67.zip

(Replace the file name with yours, and it will take 5-15 minutes.)

Once completed, the projector will automatically restart. If adb: failed to read command occurs, check integrity. USB-Or try another cable port.

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ADB-The method allows you to install firmware even if the projector does not turn on in normal mode, but requires an unlocked bootloader on new versions of the software.

Problem Solving: Firmware Errors and Correcting Them

Even if you follow the instructions, you can have a failure, and here's a table of the most common errors and how to fix them.

If the projector is completely "bricked" (does not respond to buttons, does not turn on), try emergency firmware mode via Fastboot:

1. Connect the projector to the PC in the off state.
2. Press the Menu + Power button for 10 seconds until the Fastboot screen appears.
3. Command: Fastboot flash all mijia_g1_fastboot_1.5.67.zip

Unlock the bootloader: when it is needed and how to make it

Starting with firmware 1.4.50, Xiaomi has blocked the ability to roll back on older versions without unlocking the bootloader, which is designed to protect against hacking, but makes life difficult for users who want to return the old version of the software (for example, due to bugs in the new one).

Unlocking will require:

• 📱 Mi Account tied to projector (with confirmed phone number).
• 🖥️ Mi Unlock Tool (Windows only).
• 🔗 USB-cable and stable internet connection.

The unlocking process:

1. Enable OEM Unlock in the developer settings on the projector.
2. Connect your device to your PC in Fastboot mode (as described above).
3. Start the Mi Unlock Tool, log in and follow the instructions.
4. After successful unlocking, repeat the firmware attempt.

⚠️ Warning: Unlocking the bootloader will reset all data on the projector, including image and network settings, and it may also take away your warranty if the device is still warranty-based.

FAQ: Frequent questions about Xiaomi Mijia firmware G1