Xiaomi’s mobile devices are famous for their functionality, but over time, even the most powerful flagship can face software failures. Redmi Note 5, released in 2018, is still a popular device, but the standard version of Android or MIUI can work unstable, require an update or, conversely, rollback to a lighter build. The process of reinstalling the operating system is not just a way to return the phone to factory settings, but also the opportunity to expand its capabilities.
There are several methods of software installation, each with its own characteristics and risks: you can choose to upgrade “over the air”, use Recovery mode or a deeper method through Fastboot with complete deletion of data, and understanding the differences between these methods will allow you to avoid losing important information and turning your smartphone into a “brick”.
In this guide, we will discuss in detail all the preparation steps, the necessary tools and the sequence of actions for the successful installation of firmware on the Xiaomi Redmi Note 5. We will consider the nuances of unlocking the bootloader, since without this step, many advanced methods will not be available to the user.
Device preparation and data backup
Before you start any manipulation of system software, it is critical to save your personal data.The flashing process, especially through Fastboot, often involves full formatting of internal memory.Make sure all contacts, photos and documents are copied to the Google Drive cloud server or to the computer.
It is recommended that the charge level be at least 60-70%; interruption of the process of writing system files due to battery discharge can lead to irreversible damage to the software part of the device; Use the original cable and power supply to connect to the PC.
⚠️ Note: Backup is not just a recommendation, it is a requirement. Recovery of deleted data after formatting the UserData partition is in most cases impossible without professional equipment.
To work you will need a computer running Windows, serviceable USB-cable (preferably original, as cheap cables often only support charging) and a stable internet connection to download files. USB-Hubs or ports on the front panel of the system unit – connect the cable directly to the motherboard.
☑️ Ready to flash
Unlocking the bootloader (Bootloader)
One of the key features of the Xiaomi ecosystem is the availability of a bootloader blocker. To install global firmware on the Chinese version or to obtain superuser rights, you need to officially unlock Bootloader. Without this step, installing custom recovery or firmware through Fastboot will not be possible.
The process requires you to link your Mi Account to your device and wait 7 to 168 hours, which is a security measure that the manufacturer has put in place, so you have to go to the Developer menu, turn on the Factory Unlock and link your account. SMS-Notifications of success can be started to unlock through the utility on PC.
Run the Mi Unlock Tool on your computer, log in to the same account you have on your phone. Put your phone into Fastboot mode, pressing both the power and volume buttons at the same time. Connect the device to your PC and press the Unlock button. The process will take a few minutes, after which the phone will restart and all data will be deleted.
What to do if the timer is not going?
Selecting the type of firmware: Recovery or Fastboot
Users are often confused about the types of files available for the Redmi Note 5. There are two main archive formats: Recovery (extension.zip) and Fastboot (extension.tgz).
Recovery files are designed to be updated through the built-in recovery menu or the Update app. They store user data (when updating within one region) and do not require an unlocked bootloader if the version of the software matches. Fastboot firmware contains a full system image and requires unlocking, but allows you to change the region (for example, from China to Global) and solve serious software errors.
| Parameter | Recovery (.zip) | Fastboot (.tgz) |
|---|---|---|
| File extension | .zip | .tgz (archive) |
| Data retention | Yeah (usually) | No (full reset) |
| Requirements | Recovery menu | Unlocked BL, PC, cable |
| Change of region | Impossible. | Maybe. |
When downloading files, pay attention to the device's encoding. There are different versions for Redmi Note 5 (codename: whyred). The global version is marked with the letters MI at the end of the file title, the Chinese version is CN, the Indian version is IN. Installing firmware from another region on top of your typeless (Recovery on Fastboot) can lead to a cyclical reboot.
Installation of firmware through Recovery Mode
This method is the most secure for beginners and does not require a computer connection if the file is already loaded into the phone's memory. First download the firmware archive in.zip format and place it in the root of internal memory or on a microSD card. Rename the file for convenience, for example, in update.zip, although this is not always necessary.
Go to Settings → About Phone → MIUI version. Click on three dots in the corner of the screen and select Select firmware file. Find the downloaded archive and confirm the action. The phone will restart and start the upgrade process. If this method does not work, you will need to log in to Recovery mode manually.
To manually log in, turn off the device completely. Press the power button and the volume button (+) at the same time. Hold them until the Mi logo appears, then release the power, keep the volume up. In the menu that appears, select the language (if available), then the Wipe Data option (only if you need a clean installation) and the Install Update (or "Install with SD/Memory"). Select your file and confirm the installation.
⚠️ Note: If after installing firmware through Recovery, the phone goes into an endless restart (bootloop), most likely you are trying to install a version for another region on top of the current one without full cleaning.
Firmware via Fastboot on your computer
Fastboot is the most powerful tool in the Xiaomi user’s arsenal, allowing you to write completely new parts of the system to your device. First, download the.tgz firmware archive, unpack it (you should have a folder with files and a script). flash_all.bat). Also make sure that drivers are installed. ADB and Fastboot.
Translate Redmi Note 5 In Fastboot mode, pressing the power and volume buttons (-). The screen will show an image of a hare repairing an android, or the words Fastboot. Connect your phone to a PC. Open the pack with the unpacked firmware and launch the file. flash_all.bat (The script will execute all the necessary commands.
fastboot flash boot boot.img
fastboot flash system system.img
fastboot flash recovery recovery.img
fastboot rebootDuring the firmware process, the status bars will appear in the command line. Don't turn off the cable or interrupt the process. If you see red labels or errors, check for the cable connection and drivers. Successful completion will be marked by a device reboot, which can take up to 10 minutes on the first start.
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Fastboot mode allows you to completely rewrite memory partitions, making it an ideal tool for recovering phones after failed experiments or viruses.
Error Resolving and (FAQ)
Even with strict adherence to the instructions, there can be unexpected situations. Often users encounter a “Waiting for device” error, which means that the computer does not see the phone in Fastboot mode. USB-port.
Another common problem is the anti-rollback error. Xiaomi implements rollback protection on older versions of the software. If you try to flash a version with a lower security index than the current one, the device may lock permanently. Always check the Android version and security index before downgrading.
- 🔍 Error 86006: Occurs when unlocking the bootloader, solved by re-assigning the account or waiting 168 hours.
- 🔄 Cyclical Reboot: Often treated with a full Wipe All Data cleanup in Recovery mode.
- 💾 Lack of memory: Clear the Update app cache or use the method from PC as it doesn’t depend on the phone’s free memory.
Is it safe to unlock the bootloader?
Can I use the Chinese version of Global ROM?
What if the phone doesn’t turn on after the firmware?
⚠️ Note: Using informal builds (Xiaomi.eu, LineageOS) can improve performance, but always carries the risks of unstable operation. MIUI It is compatible with the Redmi Note 5.
The Redmi Note 5 firmware process offers a wide range of opportunities to customize and restore the device, read instructions carefully, check file compatibility and do not neglect backups, and the right approach will extend the life of your device and get the latest security features.
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After successful firmware, take your time to install all the apps at once. Give the system 15-20 minutes to work in the background to optimize the database and cache, otherwise the phone may warm and slow down.