Owners of the legendary Redmi Note 5 (known in China as the Redmi Note 5 Pro) often face the need to reinstall the operating system. This device, built on the Snapdragon 636 processor, is still relevant, but software failures, accumulated debris in the system or failed experiments with superuser rights may require radical measures. Firmware allows you to return the gadget to the factory state, eliminate software errors and even update the version of Android where the official OTA-No updates are coming.
The process of software recovery is not a trivial action that requires careful study of theory before practice: you have to choose between a clean installation through the computer or recovery through the Recovery menu. Wrong actions can lead to loss of personal data or, in the worst case, to a state of “bricks” where the device stops responding to commands. However, following a clear algorithm, you can reanimate your smartphone without going to the service center.
In this article, we will take a closer look at all the available methods, tools and pitfalls that users face when working with Bootloader and system partitions. It is important to understand the file architecture and sequence of actions so that the procedure is successful the first time.
Preparation for flashing and choice of method
There are two main ways to do this: update or roll back through the embedded menu (Recovery Mode) and deep firmware through Fastboot mode using a PC. The first method is safer and easier, the second is more powerful, allowing you to change regions, roll back on older versions or restore the device after critical failures.
You will need a stable Internet connection to download files and high-quality USB-A cable that can transmit data, not just charge the battery, cheap cables often cause a connection to be interrupted at a critical time of data recording, and also make sure that the battery charge is at least 60%, as the process can take from 15 minutes to an hour.
The critical step is to back up all the data, and if you completely flash it, the internal memory will be completely cleaned, and you can save your contacts, photos and documents to the Mi Cloud or your computer, and ignoring that step will lead to permanent loss of information.
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Use the “Advanced Backup” feature in the Recovery menu to save the list of installed apps and their settings if you don’t want to reconfigure your phone.
Required tools and drivers
To work in Fastboot mode, the computer must have the appropriate ADB and Fastboot drivers installed. Without them, the system will not see the smartphone in special mode. Windows often requires the installation of universal Google USB Driver or specific Qualcomm drivers. The installation process may require manually specifying the path to files through the Device Manager.
The second component is the Mi Flash Tool, which is Xiaomi's official firmware application for filling in samples, which supports automatic partition cleaning and data integrity verification, and should only be downloaded from trusted resources or the official XDA Developers forum to avoid malicious code.
You'll also need an archiver to unpack your downloaded firmware. Files often have the.zip or.tgz extension. Inside, there are many files with.img extensions, each of which is responsible for a specific part of the system: bootloader, kernel, system, modem and recovery.
☑️ Firmware readiness check
Remember to include USB debugging in the developer menu if you plan to use methods that require interaction with the running system. You need to click on the build number several times in the About Phone section to activate the hidden menu.
Finding and downloading the right firmware
The hardest step for a beginner is identifying the correct version of the software. The Redmi Note 5 is codenamed whyred. This is the code you need to look for in the file names. The firmware is divided into Global (Global), China (Chinese), EU (European from enthusiasts) and Russia (Russian). Installing firmware from another model, such as Redmi Note 5 Pro India (codename why), will lead to the failure of the device.
There are two types of packages: Recovery (to update via phone menus) and Fastboot (to firmware via PC). Fastboot versions have a.tgz extension and weigh more as they contain all partitions for full rewriting. Recovery versions have a.zip extension and are often designed to upgrade on top of an existing system without losing data altogether, although a full cleanup is recommended.
Where can I download a secure firmware?
When choosing a version, pay attention to the status of the bootloader. If Bootloader is blocked, you can only install the official global firmware of the same regional version as the current one, or go from China to Globalka via a special script, but not vice versa.
Firmware method through Recovery Mode
This is a good way to turn on and respond to commands. The downloaded.zip file needs to be renamed to update.zip and put in the root of the internal memory (not on the SD-Then go to Recovery mode by holding the key combination Volume Up. + Nutrition.
In the recovery menu, select the language (usually available in English and Chinese) and click "Install update.zip." The system will check the digital signature. If the version is new, the process will start automatically. If you try to roll back to the older version, the system will give an error "Can't verify update," and this method will not work without the unlocked bootloader.
⚠️ Note: If the phone goes into a cyclic bootloop after installing the firmware, it may be region incompatibility or data partition damage.
Once installed successfully, the device will restart. The first run can last up to 10-15 minutes as the system optimizes applications and creates new caches. Don't panic if you see the MI logo on the screen longer than usual.
Fastboot and Mi Flash Tool
This is the most reliable method to completely clear your phone of any errors. Turn off your smartphone and enter Fastboot mode by holding Volume Down + Power. The screen will show a picture of a hare in a hat-husband fixing an android. Connect the phone to your PC with a cable.
Run the Mi Flash Tool on behalf of the administrator. Unpack the firmware archive (.tgz) into a folder with a path that does not contain Cyrillic alphabets and spaces (for example, C:\MIUI\whyred_global). Press the button “Refresh” in the ulite – it must identify the device by its serial number.
| Cleaning regime | Description of action | Data retention |
|---|---|---|
| clean all | Complete cleaning of all sections | No (full reset) |
| save user data | Firmware without deleting user files | Yes (risky) |
| clean all + lock | Cleaning and locking the loader | No (only for Global on Global) |
Choose clean all mode for guaranteed results. Press Flash and expect completion. Green "success" signifies success. The phone automatically reboots to the new system.
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The Clean All mode eliminates 99% of the software errors associated with old and new system file conflicts.
Unlocking the loader and custom firmware
Official MIUI firmware sometimes limits functionality. LineageOS (Pixel Experience) requires Bootloader to be unlocked. This is an official procedure from Xiaomi, requiring an application via the Mi Unlock app and waiting 7 to 168 hours.
Once unlocked, you get full access to partitions of memory, which allows you to install modified Recovery (such as TWRP) that can make full system backups and install modes not signed by Xiaomi keys. However, unlocking reduces data security: when a phone is stolen, attackers can theoretically access files.
Custom firmware often gives performance gains and a cleaner Android, but can have bugs in the camera or NFC work. Before installing, read the topic carefully on the 4PDA or XDA forum to know about known build-specific issues for whyred.
⚠️ Note: Once the bootloader is unlocked, Find Device and the protected Mi Cloud folder may not work properly or be disabled for security reasons. Banking applications may require additional manipulation to hide root rights.
Return to the stock (official firmware) with the bootloader locked is possible only if you do not change the partitions critically and use the clean all + lock command in the Mi Flash Tool. Otherwise, the phone can turn into a “brick” with a verification error.