Xiaomi smartphone owners often face the need to reinstall the operating system, whether to fix bugs, change region or return to factory settings. Xiaomi Redmi 9 flashing is a process that requires care, but is feasible at home with basic knowledge. Modern software recovery methods allow you to bring the device back to life even in difficult cases when the standard menu is not available.
Before you take action, you need to understand the risks and prepare all the tools. The wrong actions can lead to complete failure of the gadget, so the exact following of the algorithm is critical. In this article, we will discuss all the steps from the preparation of drivers to the final installation of MIUI.
Preparation for flashing and choice of method
The first step is to determine the current state of your device and choose the appropriate way to install the software. There are two main modes for working with system software: Recovery Mode and Fastboot Mode. The first option is suitable for updating or resetting without loss of data (in some cases), and the second is for deep flashing with full memory formatting.
To successfully complete the procedure, you will need a high-quality USB-The cable, preferably original, and the computer running Windows, the drivers must be properly installed in the system, otherwise communication with the phone will not be possible. USB-In 90% of cases, a port or a damaged cable causes a process interruption and recording errors.
The global version (Global) contains many languages and services of Google, Chinese (China) is focused on the domestic market of China and may not have the language packages you need. European version (EEA) complies with EU regulations. Choosing the wrong version can lead to problems with communication frequencies or banking applications.
It is important to understand the difference between a closed and open bootloader. If Bootloader is locked, you will only be able to install official firmware through the update menu or Recovery. To use Fastboot mode and install third-party software, the bootloader must be unlocked through Xiaomi servers.
Required tools and drivers
Well-designed workplaces are key to success, and you're going to need to download specialized software that will allow you to interact with your computer and your smartphone, and without these, the software will not see the device in the right mode.
The mandatory set of software includes:
- 📱 ADB Fastboot Tools – a basic set of commands for managing Android devices via PC.
- 💻 Mi Flash Tool – official utility from Xiaomi for firmware through Fastboot.
- 🔌 USB Drivers – Qualcomm drivers or MTK (depending on the Redmi 9 modification) for correct port definition.
- 📂 Firmware archive – a file with the extension.tgz or.zip, corresponding to your model (codename lancelot or merlin).
Installing drivers is often a stumbling block for beginners. If the Device Manager does not display Android Bootloader Interface or Qualcomm HS-USB QDLoader, you need to manually update the driver by specifying the path to the folder with ADB drivers. Sometimes you need to disable the driver signature check in Windows.
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Use it. USB-port soldered directly on the computer motherboard (back of the system unit) to avoid problems with power shortages during firmware.
Unlocking the bootloader (Bootloader)
Most deep flashing scenarios require an unlocked bootloader, a security mechanism that prevents unauthorized software from being installed. The process of unlocking is officially authorized by the manufacturer, but takes time and account binding.
The procedure is as follows:
- In the phone settings (Settings → About Phone), press 7 times on the MIUI version to activate the developer mode.
- Go to Advanced Settings → For developers and enable the items “Factory Unlocking” and “Debugging by USB”.
- Download the Mi Unlock Tool utility on your PC, log in to your Mi Account and follow the instructions on the screen.
- After submitting the application, the system will ask you to wait from 7 to 168 hours (depending on the account status) before re-attempting to unlock.
⚠️ Warning: The bootloader unlock process automatically performs a full Wipe Data reset. All photos, contacts and applications will be deleted without recovery.
Once successfully unlocked, the phone will display an open lock icon or the words Unlocked on the boot screen.This is the normal state of the device ready for modifications. Some banking applications may require additional security settings (for example, hiding root rights or using Magisk Hide) to work correctly.