Flashing a smartphone Xiaomi Redmi is a task that frightens many users because of the risk of turning the device into a “brick”. However, with the right approach and understanding of the process, even a novice can successfully update or reinstall the operating system. In this article we will analyze all the stages: from choosing the appropriate firmware to the final configuration of the phone after installation.

The main difficulty lies in the variety of models Redmi (from Redmi Note 4X to Redmi 13 Pro) and types of firmware: official from MIUI, custom based Android (for example, LineageOS or Pixel Experience), as well as regional versions (Global, China, EEA). Each option has its own nuances, so it is important to strictly follow the instructions for your specific model. The choice of firmware method is no less critical: through Fastboot, Recovery or specialized utilities like Mi Flash Tool.

Before you begin, please note: firmware will void the warranty (if it is still valid), erases all data from the device and can lead to unstable operation if an incompatible software version is selected. In some cases, you will need to unblock loader a process that takes up to 720 hours waiting for confirmation from Xiaomi.

1. Preparing for the firmware: what you need to do before you start

The first step is to back up all important data. The firmware completely clears the internal memory, so photos, contacts, messages and files will be lost. Use Mi Cloud, Google Drive or physical copying to a PC. Please note: some custom firmware requires partition formatting data, which makes data recovery impossible without a preliminary backup.

Next, check your model Redmi and current version MIUI. To do this, go to Settings → About phone. Write down the exact model name (for example, Redmi Note 11 Pro 5G with code name veux) and firmware version (for example, MIUI 14.0.3 based on Android 13). This information will be needed to select compatible software.

  • 📱 Make sure that the battery charge is at least 60% —a sudden shutdown during the firmware can damage the system.
  • 🔌 Prepare a USB cable (preferably original) and the PC with installed drivers Xiaomi.
  • 🔓 Disable screen lock (PIN, pattern) - it may interfere with access to Recovery.
  • 🌐 Check stability Internet connectionsif you plan to download the firmware directly to your phone.
⚠️ Attention: If your Redmi purchased in China (market version China), the firmware of the global version MIUI may block the network due to differences in modem modules. In this case, additional IMEI settings will be required.
📊 What firmware are you planning to install?
Official MIUI Global
Custom (LineageOS, Pixel Experience)
Official MIUI China
Other

2. Firmware selection: official MIUI vs custom builds

Official firmware from Xiaomi are divided into three types:

  • 🌍 Global - for the international market, with support Google Services and many languages (including Russian).
  • 🇨🇳 China —Chinese version without services Google, but with additional functions for the local market.
  • 🇪🇺 EEA —European version, similar to Global, but with some limitations (for example, missing Mi Video).

Custom firmware (for example, LineageOS, Pixel Experience, HavocOS) offer “clean” Android without a proprietary shell MIUI, but may lose some functions (for example, IR Blaster or mode Game Turbo). Their installation requires an unlocked bootloader and is often accompanied by bugs (for example, a non-working camera or fingerprint sensor).

Firmware type Advantages Disadvantages Is bootloader unlocking required?
Official MIUI Global Stability, support OTA updates, all functions work Advertising in MIUI, limited customization No (except downgrade)
Official MIUI China More frequent updates, additional features for China No Google Services, possible problems with the network No
Custom (LineageOS) Pure Android, no advertising, flexible configuration Possible bugs, no support for some functions Yes
Custom (Pixel Experience) Interface like Google Pixel, fast updates May not support camera or NFC Yes

For beginners, it is recommended to start with the official MIUI Global. You can download it from the website en.miui.com (choose version Stable, not Developer, if you do not need experimental functions). Look for custom firmware on the forums XDA Developers or 4PDA, but be sure to check compatibility with the code name of your model (for example, vili for Redmi Note 10 Pro).

Where can I download firmware for rare models?

If your model Redmi is not presented on the official website (for example, regional versions for India or Indonesia), try the following sources:

1. Xiaomi Firmware Updater (GitHub) - archive of firmware for all models.

2. 4PDA - Russian-language forum with discussions and links to firmware.

3. Telegram channels developers of custom builds (for example, MIUI Poland or Xiaomi EU).

Beware of sites with suspicious domains - they can distribute firmware with malware.

3. Unblocking bootloader: a mandatory step for custom firmware

The bootloader (Bootloaderon all smartphones Xiaomi is blocked by default for installing custom firmware or even official MIUI via Fastboot it needs to be unlocked. This process consists of two stages: obtaining permission from Xiaomi and direct unlocking via Mi Unlock Tool.

First link your account Mi to the device: go to Settings → Xiaomi Account → Mi Cloud and enable synchronization. Then send an unlock request through the official application Mi Unlock (you can download it at en.miui.com/unlock). Since 2023, the waiting time for confirmation is up to 30 days (previously it was 720 hours), but for some models it may take up to 7 days.

Link a Mi account to the device|Download Mi Unlock Tool from the official website|Enable USB debugging in the developer settings|Disable all screen locks|Connect the phone to the PC in Fastboot mode (Power + Vol- buttons)-->

After receiving an SMS notification about unlock permission:

  1. Run Mi Unlock Tool on PC (Windows required).
  2. Login using the same account Mias on your phone.
  3. Transfer Redmi to mode Fastboot (press Power + Vol- with the phone turned off).
  4. Connect the device to the PC and press Unlock in the app.
⚠️ Attention: Unlocking the bootloader resets the phone to factory settings! Also note that some banking applications (for example SberBank Online or Tinkoff) may stop working on devices with an unlocked bootloader due to security requirements.

4. Firmware methods: Fastboot, Recovery or Mi Flash Tool

There are three main ways to flash Xiaomi Redmi:

  • 🔧 Through Fastboot - a universal method, suitable for official and custom firmware. Requires a PC and an unlocked bootloader (for custom ones).
  • 🔄 Via Recovery - easier, but only suitable for official MIUI format .zip. Does not require unlocking.
  • 🖥️ Via Mi Flash Tool —the official utility from Xiaomi for flashing firmware via Fastboot. Supports mode selection (clean all, save user data).

Let's look at each method in more detail.

4.1 Firmware via Fastboot (for experienced users)

This method is suitable for installing official firmware in the format .tgz or custom ones via fastboot-commands. You will need:

  • Unzipped firmware (folder with files images).
  • Installed drivers ADB/Fastboot and Mi Flash Tool.
  • Unlocked bootloader (for custom firmware).

Instructions:

  1. Switch the phone to mode Fastboot (Power + Vol-).
  2. Connect to the PC and check the device is detected with the command: 
    fastboot devices
  3. For official firmware, use Mi Flash Tool:
    1. Select the folder with the firmware.
    2. Specify the mode clean all (full clear).
    3. Press Flash and wait for completion (5-10 minutes).
  4. For custom firmware, enter commands manually (example for LineageOS): 
    fastboot flash boot boot.img

    fastboot flash system system.img
    

    fastboot flash vendor vendor.img
    

    fastboot flash dtbo dtbo.img
    

    fastboot reboot

4.2 Firmware via Recovery (easy method)

If you install the official MIUI format .zip, you can do without a PC:

  1. Download the firmware and rename the file to update.zip.
  2. Move it to the root of the internal memory.
  3. Go to Recovery (Power + Vol+ with the phone turned off).
  4. Select Install update.zip and confirm installation.
⚠️ Attention: Firmware via Recovery does not reset the data, but if the version MIUI is very different from the current one (for example, from 12 to 14), errors may occur. In this case, a full reset via Wipe Data.
💡

If Mi Flash Tool gives an error can't find fastboot, try running it as an administrator or installing drivers manually via Device Manager (select Android Bootloader Interface for an unknown device).

5. Typical errors and their solutions.

Even if you follow the instructions exactly, problems may arise. Let's look at the most common ones:

Error Cause Solution
This package is for "vili" devices; this is a "veux" The firmware is not suitable for your model Download the firmware for the correct code name (check in Fastboot command fastboot getvar product)
Error: Failed to boot into fastbootd Unlocked or damaged bootloader Fastboot Check the lock status with the command fastboot oem device-info (should be unlocked: true)
Phone stuck on logo MI Incompatible firmware or interrupted process Repeat the firmware via Fastboot with complete cleaning (clean all)
E: Footer is wrong in Recovery Damaged file update.zip Download the firmware and check the checksum (MD5)

If after flashing the phone does not turn on or constantly reboots, try:

  • 🔄 Return to the previous version MIUI (if there was a backup copy in Recovery).
  • 🔧 Install the firmware via EDL Mode (emergency mode, requires an authorized account Xiaomi).
  • 📞 Contact the service center if the problem is hardware (for example, damaged memory).
💡

If after the firmware the IMEI disappears or does not work network, never restore it through the engineering menu (##4636##) - this can lead to permanent blocking of the modem. Use only official methods (for example, through QCN file at the service center).

6. Setting up the phone after flashing the firmware

After successful installation of the firmware, the phone will start in initial setup mode. Here's what you need to do first:

  1. Skip linking your account Mi (if you do not plan to use the services Xiaomi). This will speed up the process and avoid unnecessary notifications.
  2. Restore data from backup (if it was created via Mi Cloud or Google).
  3. Check the operation of key functions:
    • 📶 Mobile network and calls.
    • 📷 Camera (especially night mode and 4K video).
    • 🔋 Fast charging and wireless technologies (NFC, Bluetooth).
  4. Disable unnecessary functions MIUI:
    • Advertising in system applications (Settings → Memory → Cleaning).
    • Automatic update of applications in the background.
    • Collection of analytics (Settings → Advanced → Privacy).

If you installed custom firmware, additional configuration may be required:

  • 🔒 Installation Magisk to obtain root-rights (needed for some modules, for example ViPER4Android).
  • 🎯 Setting SELinux in mode Permissive (if some functions do not work).
  • 🔄 Updating via OTA may not work - watch for the release of new builds on the forums.
How to return the official MIUI after custom firmware?

1. Download the official firmware in format Fastboot for your model.

2. Unlock the bootloader (if it was locked after custom firmware).

3. Flash via Mi Flash Tool cleaning (clean all).

4. After rebooting, perform a factory reset (Wipe Data v Recovery).

Please note: switching from custom firmware to the official one may lead to data loss on the internal drive!

7. Optimizing performance after firmware

Fresh firmware is a good reason to optimize your phone's performance. Here are some tips for Xiaomi Redmi:

  • 🚀 Disable animation to speed up the interface:
    1. Activate Developer mode (7 taps on Build number in About phone).
    2. Go to Settings → Advanced → For developers data-i="289">Window animation Settings → Advanced → For Developers.
    3. Install Window animation, Transition animation And Animator duration on 0.5x or Disabled.
  • 🔋 Optimize battery consumption:
    • Disable Auto-sync for unnecessary accounts.
    • Limit background activity of applications (Settings → Applications → Permissions → Autorun).
    • Turn on Power saving mode manually or on a schedule.
  • 🛡️ Increase security:
    • Install Google Play Protect and scan regularly device.
    • Disable installation of applications from unknown sources (Settings → Applications → Accessibility).
    • Set up a screen lock (preferably Password instead Graphic key).

    • For custom firmware it is additionally recommended:

    • 🔧 Install a kernel with optimized settings (for example, FrancoKernel to improve autonomy).
    • 🎨 Use themes and icon packs via Substratum or Hex Installer.
    • 📊 Set CPU Governor to balanced mode (for example, interactive instead of performance).

      • FAQ: Frequently asked questions about Xiaomi Redmi firmware

      Is it possible to flash Redmi without unlocking the bootloader?

      Yes, but only the official one MIUI via Recovery (method update.zip). For custom firmware or firmware via Fastboot unlocking is required. Also, unlocking is not required if you update via OTA (settings → update the system).

      Why does the mobile network not work after the firmware?

      This problem is typical for Chinese versions MIUI (for example, if flashed China ROM to the global model). Solutions:

      1. Install the correct firmware for your region.
      2. Check the settings APN (they may be reset).
      3. If the IMEI has been reset, restore it through a service center (self-recovery may block modem).

      How to return the stock firmware if the phone has become a brick?

      If the phone does not turn on or is stuck on the logo:

      1. Try to log in Fastboot (Power + Vol-) and flash the official version via Mi Flash Tool.
      2. If Fastboot is unavailable, use EDL Mode (an authorized account is required Xiaomi and cable Deep Flash).
      3. As a last resort, contact the service center - they can reflash the phone via Qualcomm HS-USB QDLoader.

      Which Redmi models cannot be flashed via Fastboot?

      All modern models Xiaomi Redmi (starting from 2018) support firmware via FastbootHowever, for some budget devices (for example, Redmi Go or Redmi A1) may require a special utility SP Flash Toolsince they are built on the platform MediaTekand not Qualcomm Snapdragon.

      How often do you need to update the firmware?

      For official MIUI It is recommended to install updates as they are released (once every 1-2 months). Custom firmware is updated more often (weekly or monthly), but not always stable. If the phone works flawlessly, a forced update is not necessary - new versions may contain bugs.