The process of restoring the shell or installing a new version of the operating system on the Xiaomi Redmi Note 5A is often necessary if software failures, freezes or a desire to update Android to a more current version that the manufacturer no longer distributes “over the air.” Unlike the standard update through the settings menu, the method using a personal computer gives the user full control over the process and allows you to correct critical errors, making the phone again usable.
There are two main ways to accomplish this: through Recovery mode for simple updates and through Fastboot mode for deep flashing with complete data clearing. The choice of the specific method depends on the current state of your device: if the phone turns on and works but glitch, the first option will work; if the smartphone has turned into a “brick” or you forgot the pattern lock, only the bootloader mode will help.
Before you start any manipulation of system files, it is extremely important to realize that incorrect actions can lead to complete inoperability of the gadget. For the Redmi Note 5A model (codenamed olive or riva), it is critical to use firmware designed specifically for your processor, since confusing versions for Snapdragon and MediaTek is fatal. carefully study the requirements and prepare everything necessary to avoid unpleasant surprises in the middle of the process.
Preparation of the workplace and necessary tools
The success of the operation depends on the quality of preparation. You will need a stable computer running Windows, as drivers for Xiaomi work best in this environment. Make sure that there is enough free space on the hard drive to unpack the archives with firmware, which can weigh up to 2-3 gigabytes.
Cable USB It should be original or high-quality analogue, capable of transmitting data, not just charging the device. Cheap cables "only for charging" will cause the computer simply will not see the phone in the right mode. USB-port soldered directly on the PC motherboard (back of the system unit) to avoid power shortage problems.
Remember to back up all important data, as the Fastboot flashing process involves completely clearing the internal memory. Once the procedure is complete, it will be impossible to recover photos, contacts and messages without a prior backup.
To work, you will need the following software components:
- 📦 Firmware archive (Global or China version depending on the region).
- 💻 Mi Flash Tool (official utility from Xiaomi).
- 🔌 Drivers. ADB Fastboot (installed separately or included in the SDK).
- 📱 Unlocked bootloader for the Fastboot method.
Where to Download Official Firmware and Drivers
Finding the right firmware file is the stage where users often make mistakes. For the Redmi Note 5A, it is important to distinguish between the global version (Global) and the Chinese version (China). Global firmware contains Google Play services and support for many languages, including Russian, while Chinese may not have Russian out of the box and require additional manipulations to work with European communication frequencies.
You should only download files from trusted resources, such as the official website miui.com or authorized mirrors like xiaomifirmwareupdater.com. Using firmware from third-party forums without checking checksums can lead to the installation of modified software with malware or system errors.
Drivers are needed to ensure that Windows correctly recognizes the connected device in bootloader mode. Without drivers installed in Device Manager, the phone will appear as “Unknown Device” or “Android”, making flashing impossible.
Unlocking the Bootloader bootloader
Before you start installing software through Fastboot, you need to unlock the bootloader, a security measure from Xiaomi that prevents the installation of unauthorized software. The process requires linking the Mi Account to the device and waiting for a certain period of time, which can be from 7 to 30 days.
To start, activate the developer mode by clicking on the build number several times in the About Phone section. Then, in the Developer Menu, turn on OEM unlocking and USB debugging. After that, start the Mi Unlock app on your PC and follow the instructions for linking your account.
⚠️ Warning: The process of unlocking the bootloader automatically deletes all data from the device. If you unlock the bootloader on an already running phone, all photos and contacts will be erased without the possibility of recovery.
After the waiting period expires (the timer is displayed in the Mi Unlock app), repeat the procedure for entering Fastboot mode and press the Unlock button. Successful unlocking will be confirmed by the message "Unlocked successfully" and vibration of the device.
Fastboot (Mi Flash Tool)
This is the most reliable way to recover the Redmi Note 5A after a major crash. The method requires that the bootloader be unlocked. First, unload the downloaded archive with the firmware to the root of the C disk so that the path to the folder is Cyrillic characters free and short, such as C:\rom.
Put your smartphone into Fastboot mode, holding both the power and volume buttons until an image of a hare repairing an android appears. Connect the device to your PC and launch the Mi Flash Tool. If the drivers are installed correctly, the phone serial number will appear in the top line of the program.
☑️ Checklist before firmware
Click the "Select" button and point the path to the folder with the unpacked firmware. In the bottom corner of the program window, select the firmware mode: "Clean all" will completely clear the data, and "Save user data" will try to save it (not recommended when changing the Android version). Click "Flash" and wait for the process to end, which takes about 200-300 seconds.
The table below will help you understand the firmware modes in the Mi Flash Tool:
| Regime. | Description | Impact on data | Recommendation |
|---|---|---|---|
| Clean all | Complete cleaning and installation | Everything's gone. | Recommended for a clean start |
| Save user data | Updating with preservation | Data is retained | Only for updating the version |
| Clean all and lock | Cleaning and locking | Everything's gone. | Only for original firmware |
Installation of firmware through Recovery Mode
If the bootloader is locked or you just want to upgrade without using sophisticated tools, Recovery is the method that works if the phone is turned on and can boot into recovery mode. You'll need a firmware file in.zip format, not.tgz.
Copy the firmware file into the phone's internal memory (not the folder, but the root). Reboot the device by clamping the power and volume buttons. From the menu that appears, select the language (English or Chinese) and click on the installation icon.
Select a firmware file from the list. The system will warn you of the risks, confirm the action. Importantly, if you move from a newer version of MIUI to an older version (rollback), standard Recovery may block the installation, in which case you will need to clean the data before you try again.
⚠️ Note: When you select the "Wipe Data" mode in Recovery, the menu deletes absolutely all user files, including photos, music and installed applications.
Solving errors and problems in firmware
In the process of flashing Xiaomi Redmi Note 5A Error 1 or Error 3 code in the Mi Flash Tool usually indicates problems with drivers or cable. Try reinstalling drivers through Device Manager or replacing them. USB-port.
If the phone goes into an endless bootloop after firmware has been installed, it may have been installed firmware from another model or damaged the boot partition, in which case only reflashing in Fastboot mode with the choice of the item "Clean all".
The error "Phone is locked" when trying firmware indicates that the bootloader is not unlocked, or the Mi Account that was unlocked does not match the one under which the Mi Flash Tool was logged in. Check the status of the bootloader with the fastboot oem device-info command.