Xiaomi smartphones are famous for their customizability, and the Redmi 9 model is no exception, offering users ample opportunities for software modification. Often owners face the need to change the regional version of the firmware, for example, when buying a device from China, where there is no Russian language and Google services.
The process of updating or replacing the operating system requires careful and strict adherence to the algorithm of actions. Incorrect installation of files can lead to complete inoperability of the gadget, so it is important to study the theoretical part in advance. In this article, we will discuss all the steps from the preparation of tools to the final configuration of MIUI.
Before you start taking action, you need to be clear about what you want to get. There is a difference between simply updating through the settings menu and completely flashing through your computer using Fastboot or Recovery modes. The choice of method depends on the current state of your Redmi 9 and your goals.
⚠️ Attention: Any manipulation of the smartphone software is carried out at your own risk.The author is not responsible for the possible failure of the device as a result of user errors.
Preparatory stage and necessary tools
The success of the operation depends on the quality of preparation. You will need a Redmi 9 smartphone with a battery charge of at least 60%, preferably more, since the process can take a long time.
The connection cable must be of high quality and provide stable data transfer, not just charging. Cheap cables often cause communication interruptions during firmware, which can fatally affect the state of the bootloader. It is recommended to use the original USB Type-C wire that came with the device.
You need to install the current ADB and Fastboot drivers on your computer, as well as specific Xiaomi USB Driver drivers. Without these components, the computer simply will not see the smartphone in the right mode, and no utilities will start. Often problems arise during the installation of drivers, especially in Windows 10 and Windows 11 systems, where you need to disable the driver signature verification.
- 📱 Redmi 9 smartphone with unlocked bootloader (for the Fastboot method).
- 💻 Computer with Windows OS and installed drivers.
- 🔌 Original. USB-data-line.
- 💾 Archive with firmware, corresponding device model.
☑️ Firmware readiness check
Unlocking the Bootloader bootloader
Official firmware via Fastboot is not possible without an unlocked bootloader. Xiaomi has implemented this security measure to prevent device theft and malware installation.The procedure binds the Mi Account account to a particular device and requires a wait of 7 to 168 hours (usually 7 days) after filing an application.
To start, you need to turn on the developer mode in the smartphone settings. Go to Settings → About the phone and quickly click on the MIUI version seven times. After the message “You became a developer”, return to the main settings menu, find the Additional → For developers section and activate the “Factory Unlock” item.
Next, you'll need the Mi Unlock Tool, which you'll download from the official website. Launch the program on your PC, log in to your Mi Account and put your phone into Fastboot mode, holding down the volume and power buttons at the same time. Connect the device to your PC and follow the instructions on the screen. If (wait time) is not yet out, the program will report it, and you'll have to wait.
What if Mi Unlock can’t see the phone?
Selection of firmware type: Global, China or Custom
Understanding the differences between software versions is critical to the stable operation of Redmi 9. The global version (Global) is designed for the international market, has built-in Russian, Google services and is optimized for our communication frequencies. The Chinese version (China ROM) may not have Russian out of the box and often lacks some LTE frequencies, which is relevant for rural areas.
Custom ROMs like LineageOS or Pixel Experience allow you to get a “pure” Android without a MIUI shell. This gives you an increase in performance and autonomy, but often deprives the user of the original features of the Xiaomi camera and requires more knowledge to install. For the average user, the official Global ROM remains the best choice.
It is important to pay attention to the type of firmware: Recovery or Fastboot. Recovery files have the.zip extension and are installed via the recovery menu or third-party recoveries. Fastboot files have the.tgz extension and require a PC connection and the use of the appropriate software. If you confuse these formats, you will not be able to complete the process.
Firmware method through Mi Flash Tool
The most reliable and common way to install software on Redmi 9 is to use the official Mi Flash Tool, which allows you to completely clear the internal memory and install a fresh copy of the system, which often solves problems with software errors. Before you start, download the archive with the.tgz firmware and unpack it in the root of the C disk so that the path to the folder does not contain Cyrillic.
Launch the Mi Flash Tool on behalf of the administrator. Put your smartphone into Fastboot mode (pressing the power and volume buttons down) and connect it to your computer. Press the Refresh button in the utility — if the drivers are installed correctly, the serial number of the device will appear in the list. In the lower right corner, select the mode of operation: "Clean all" will completely delete the data, "Save user data" will try to save it, but may cause errors when changing region.
After selecting the path to the unpacked firmware (Select button), press Flash. The process will take 200 to 600 seconds. At this time, it is strictly forbidden to turn off the cable or interrupt power. Upon completion, the status will change to Success, and the phone will automatically restart. The first download can last up to 10 minutes.
⚠️ Warning: When you select Clean All mode, all your photos, contacts and apps will be permanently deleted.
Install firmware through the Recovery menu
The Recovery update method is suitable for those cases where the bootloader is locked or you just want to upgrade to a newer version without losing data. The.zip firmware file must be placed in the root folder of the phone's internal memory. Then you need to go to recovery mode: press the power and volume button up until the Mi logo appears.
In the Recovery menu, you can control volume buttons (up/down) and power button confirmation. Select the language (if available), then the Wipe Data option (only if you need a full cleanup) or immediately go to Connect with MIAssistant for installation via PC, or use the built-in bootloader if it allows you to select a file from memory. However, the standard Recovery Xiaomi often blocks the installation of zip files with memory, requiring a password from the account.
If the standard menu does not allow you to install a file, you will need a third-party Recovery, such as TWRP. Its installation is possible only on the unlocked bootloader through the computer. Once you install TWRP, the process is simplified: the firmware file is copied to the phone, the TWRP menu selects "Install", the file is specified and the swipe confirms. This gives more features, but requires high qualification.
| Parameter | Mi Flash Tool (Fastboot) | Recovery (Zip) | TWRP Recovery |
|---|---|---|---|
| Requirements | Unlocked BL, PC | Access to the Recovery menu | Unlocked BL, PC |
| Data retention | Only in Save User Data mode | Possibly without loss. | Depends on the choice of Wipe |
| Risk of error | Medium. | Low. | High-pitched |
| Change of region | Possible (China -> Global) | Limited. | Possible. |
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If your phone is stuck on the Mi logo after you have firmware, try doing a full Wipe All Data reset via Recovery mode, which often solves the problem of bootloop.
Recovery after a failed firmware
Even if all the rules are followed, you may experience a situation where Redmi 9 stops booting, entering the "brick" state. If the phone responds to buttons and enters Fastboot or Recovery mode, the device is subject to software recovery. Repeat the firmware procedure through the Mi Flash Tool, selecting "Clean all" mode.
In more complex cases, when the screen does not light up at all, EDL (Emergency Download) mode may be required, which is often required to disassemble the case and close contacts on the board, or use a special cable, which is only possible through an authorized Mi Authorized Service account, making this method available mainly in service centers.
It is worth noting that firmware errors are often not related to the file itself, but to the interruption of the process. USB-The port may go off, the computer may go to sleep, or the antivirus may lock the driver, so turn off the power saving before you start. USB and temporarily deaktivirujte antivirus software.
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The main cause of firmware failure is an unstable USB connection or power interruption. Use short cables and a charged laptop or UPS for a desktop PC.