How to Reflash Xiaomi via Fastboot: A Complete Guide with Teams and Tips

Why You Need Fastboot Firmware and When to Use It

Fastboot flashing a Xiaomi smartphone through Fastboot mode is a radical but effective way to update or restore the system when standard methods don’t work. Unlike Recovery firmware, Fastboot allows you to interact with the device at a low level even if Android doesn’t boot, a technique that is relevant in three key scenarios:

First, when the smartphone is fixated on the Mi logo or Bootloop mode after an unsuccessful OTA update. Second, if you want to install custom firmware (like LineageOS or Pixel Experience) that requires an unlocked bootloader. Third, Fastboot is the only way to bring the device back to life after bricking due to improper modification of system files. However, it is important to understand that this process erases all data on the device and requires the bootloader to be unlocked beforehand.

There is a myth among Xiaomi users that Fastboot firmware will automatically unlock the bootloader. This is not true: without official permission from Xiaomi (via the Mi Unlock Tool), most modern models will simply not accept the new firmware. Moreover, since MIUI 13, the company has tightened its security policy, and now even installing official firmware through Fastboot may require authorization of the Mi Account.

Preparation for firmware: what to do before the start

Before you start your firmware, make sure that all the preliminary steps are followed, and ignoring them can lead to a complete loss of service of the device, the so-called "brick." Here is a checklist of mandatory actions:

Make a backup copy of the data (photos, contacts, messages)

Check the device model in Settings → About the phone

Download the correct firmware version for your model

Install Mi Flash Tool and ADB/Fastboot drivers

Unlock the bootloader via Mi Unlock Tool (if not unlocked)

Charge your phone at least 60%-->

Pay special attention to the choice of firmware. For Xiaomi, there are three types of firmware:

• 📦 Stable - Official stable versions MIUI (Recommended for most users).
• 🧪 Developer – test builds with new features but possible bugs.
• 🔧 Fastboot firmware – complete packages for installation via Fastboot (have the extension.tgz or.zip).

Download the firmware only from official sources:

• 🌐 Xiaomi official website (select the Global Region, EEA China, depending on the model).
• 🔗 Xiaomi Firmware Updater – an alternative source with current versions.

Warning:

⚠️ Note: If your device was purchased in China (market version) CN), global-firmage (Global/EEA) It may lead to problems with LTE-Google networks and services. Check compatibility in advance!

Unlocking the bootloader: without this Fastboot firmware is not possible

The bootloader on all modern Xiaomi smartphones is locked by default, a security measure that prevents unauthorized system changes. To flash the device through Fastboot, it must be unlocked using the official Mi Unlock Tool.

The unlocking process takes between 3 and 360 hours (depending on Xiaomi’s policy) and requires:

1. Linking your Mi Account to your device (in Mi Account → Mi Cloud → Find your device).
2. USB Debugging Enables (Settings → About Phone → MIUI Version (7 times press) → Additional → For Developers → USB Debugging).
3. Internet connection (unblocking is done through Xiaomi servers).

Instructions for unlocking:

1. Download the Mi Unlock Tool and install it on PC.
2. Launch the utility on behalf of the administrator and log in under the same Mi Account as on your phone.
3. Transfer the phone to Fastboot mode: turn it off, then press Volume down + Power until the hare appears in the eardress cap.
4. Connect the device to your PC and press Unlock in the program. Wait for the process to complete (it may take several attempts).

⚠️ Note: Once the bootloader is unlocked, all data will be deleted from the device, and the Xiaomi warranty will be canceled. L1 for HD-The streaming may stop working.

Yes, long | Yes, but I've run into problems | No, I'm afraid I'll lose my warranty | No, I don't see the point-->

Step-by-step: how to flash Xiaomi through Fastboot

When the bootloader is unlocked and the firmware is downloaded, you can start the process.

• 🖥️ Computer running Windows 7/10/11 (For the Mi Flash Tool).
• 🔌 Cable USB Type-C (preferably original to avoid communication breakdowns).
• 📂 Firmware in.tgz format (unpack it into a folder without Cyrillic characters!).
• 🛠️ The Mi Flash Tool.

Algorithm of action:

1. Firmware Preparation: Unpack the firmware archive into a folder (for example, C:\miui_fastboot). Make sure there is a file inside. flash_all.bat (for manual mode) or images (for Mi Flash Tool).
2. Start Fastboot Mode: Turn off the phone. Press Volume down + Power before the Fastboot logo appears.
3. PC Connection: Connect your phone to your computer with a cable. Launch the Mi Flash Tool on behalf of the administrator.
4. Select firmware and mode: In the Mi Flash Tool, click Select and specify the path to the firmware folder. Select Clean all or Clean all and lock mode. + Lock the bootloader after firmware. Press Refresh - the device should be determined in the list.

Start of firmware:

• Click Flash and wait until it is completed (usually 5-15 minutes).
• At the end of the phone will automatically restart.

If the Mi Flash Tool is an error (e.g., can't find fastboot), try:

• 🔄 Reinstall drivers manually through Device Manager.
• 🔌 Use the other USB-port USB 2.0 on the back of the PC).
• 📥 Download the firmware again (possibly the archive is damaged).

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If the Mi Flash Tool doesn’t see the device, try running it in Windows 7 Compatibility Mode. Right-click on the shortcut → Properties → Compatibility → select Windows 7 and select Run on behalf of the administrator.

Common mistakes and their solutions

Fastboot firmware rarely goes smoothly, especially on new Xiaomi models. Below is a table of the most common problems and ways to fix them:

The Anti-rollback bug is especially insidious, and it happens when you try to install firmware older than the one you already have on your device, like if your Redmi Note 10 Pro has a MIUI 14 and you're trying to flash MIUI 12, and the only way out is to find firmware for the same or newer version.

Another common problem is that you freeze in the waiting for device phase, which means that the PC doesn't see the phone in Fastboot mode.

• 🔄 Reboot your phone in Fastboot again (sometimes it helps to disconnect/connect the cable).
• 🖱️ In Device Manager, check if the device is defined as Android Bootloader Interface.
• 🔧 Install drivers manually (download Google) USB Driver).

Mi Flash Tool: Manual method through Fastboot commands

If the Mi Flash Tool refuses to work (e.g. on Linux or macOS), you can manually flash the device through fastboot commands, which requires knowledge of the basic commands and accuracy, but gives you more control over the process.

You'll need:

• 🖥️ Established ADB and Fastboot (part of Android) SDK Platform-Tools).
• 📂 Unpacked firmware with images files (for example, boot.img, system.img etc.).

Instructions:

1. Open the command prompt (cmd) in the firmware folder (hold Shift + right mouse button → Open the PowerShell window here).
2. Check the connection of the device: fastboot devices should display the serial number of the phone.
3. Scroll each section in turn (example for Redmi Note 9 Pro): fastboot flash boot boot.img fastboot flash recovery.img fastboot flash recovery system.img fastboot flash vendor.img fastboot flash dtbo dtbo.img fastboot flash vbmeta vbmeta.img
4. Clear the cache and user data: fastboot erase userdata fastboot erase cache
5. Reboot the device: fastboot reboot

⚠️ Note: With manual firmware, it is easy to skip a critical partition (such as modem or bluetooth) that will result in loss of communication or Wi-Fi. Always check the file list in the firmware and the documentation for your model!

💡

The manual method through fastboot commands is suitable for advanced users. For beginners, it is more reliable to use the Mi Flash Tool, since it automatically checks the integrity of the firmware and the sequence of the installation.

What to do after the firmware: setup and verification

Once the firmware is successful, the device will restart to the clean system, and it can take 5-10 minutes to turn on the first one, which is normal.

1. Initial setting: Select language, region and connect to Wi-Fi. Sign in to Mi Account (required if you have been through an official MIUI) and skip recovery suggestions from backup (if it was made before firmware).
2. Check performance: Make sure you have an IMEI (type *#06#). Check the camera, speakers, microphone and sensors. Connect to the mobile network and Wi-Fi.

System update:

• Go to Settings → About Phone → System Update and check the relevance of the firmware.
• If an update is available, install it (this will fix any bugs in the initial version).

If there are problems after the firmware:

• 📵 No network: check if the modem and nvram partitions are stitched together. persist.img.
• 🔊 The speakers/microphone are not working: it may not be stitched with dsp or audio partition.
• 🔋 Fast battery discharge: Calibrate the battery (discharge to 0%, then charge to 100% without interruption).

If you have stitched custom firmware (such as LineageOS), additionally:

• Install Open GApps (if you need Google services).
• Check the status of SafetyNet through the SafetyNet Test application (important for banking applications).

FAQ: Answers to Frequent Questions