Xiaomi Redmi Note 3, despite its age, is still popular thanks to the successful metal body and Snapdragon processor. However, over time, the standard version of the MIUI firmware ceases to receive security updates, and Chinese models lack important Google services, in which case the only way out is a complete reinstallation of the operating system for a fresher or global build.
The process of replacing software on this device has its own unique features that distinguish it from more modern models of the brand. It is important to consider the differences between the versions of the processors, since the methodology for Snapdragon and MediaTek is radically different. Wrong actions can lead to the failure of the device, so you need to clearly follow the algorithm.
In this article, we will look at all the steps of preparing, selecting a file and installing a new system directly. You will learn how to unlock the bootloader, what tools will be required to work in Fastboot mode, and how to avoid common errors.
Preparation for flashing and selection of version
Before you start any manipulation of the code, you need to make sure that the hardware is intact. First of all, check the volume and power buttons, as they will be actively used to enter recovery modes. Also make sure that the battery is charged at least 60% so that the device does not turn off at a critical time of data recording.
The key is to determine the exact model of your processor. Owners of the Redmi Note 3 Pro (Kenzo/Kate) version use the Snapdragon 650 chip, whereas the regular version (HmNote3Pro) can run on MediaTek. Snapdragon firmware is categorically not suitable for MediaTek and vice versa - this will lead to a complete brick of the device.
You will need to download the Mi Flash Tool to your computer, which allows you to download system images directly to your phone’s memory, bypassing the standard update menu. Be sure to install the ADB and Fastboot drivers, without which your computer will not see the smartphone in the desired mode.
- 📱 Make a full backup of all contacts, photos and messages, as the memory will be completely cleared.
- 💻 Install Qualcomm drivers on PC or MTK depending on your processor model.
- 🔓 Make sure that your Mi Account is linked to your device if you want to unlock the bootloader.
Don't ignore the backup phase. Even if you plan to clean up, losing important documents or working files can come as a nasty surprise.Use cloud services or copy data to the public. SD-pre-work-card.
Unlocking the Bootloader bootloader
Official firmware often has a locked bootloader, which prohibits the installation of modified images or global versions.To remove restrictions, Xiaomi has developed a special utility Mi Unlock Tool.
To start, activate Developer Mode. Go to Settings → About Phone and quickly press 7 times on MIUI Version. After the notification appears, go to the advanced settings and find Mi Unlock Status. Here you need to link your account to your device by turning on mobile Internet.
⚠️ Note: Once the account is linked to the unlock device, you must wait until the time is set. Attempts to unlock earlier will lead to a timer error.
When the wait time is up, turn off your phone and press the Volume Down + Power buttons until the Fastboot logo appears. Connect the cable to your PC, launch the Mi Unlock Tool and press the Unlock button. The process can take a few minutes, after which the phone will restart and clear the data.
What to do if Mi Unlock is making an error?
Firmware search and preparation
Choosing the right image file is the foundation of a successful operation. For Redmi Note 3, there are different build types: Global (global), China (Chinese), Developer (for developers), and ports (for example, Pixel Experience or LineageOS). For the average user, the best choice will be a stable Global ROM based on Android 6 or custom builds based on Android 7-9.
The firmware file must have a.zip extension for the method of updating through_recovery_ Or be unpacked with a set of files for the Fastboot method. If you use the Mi Flash Tool, the archive should be unpacked into the root of the disk so that the path does not contain Cyrillic characters.
Check the checksums of downloaded files if you can find one on the source site. A damaged archive can interrupt the process by 90%, which requires a repetition of the entire procedure, and it is most reliable to download files from official forums or trusted resources like XDA Developers.
- 📂 Unpack the firmware archive in a short-cut folder, for example C:\rom\.
- 🔍 Make sure there is a file inside the folder. flash_all.bat picture.
- 💾 Check the free space on the computer system disk, it is necessary for temporary files.
Note the Android version: An attempt to roll back to an older version of the system (Downgrade) without special manipulation of partitions can be blocked by anti-Rollback protection.
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Use the original. USB-Cheap charging cables often lack data lines, resulting in permanent connection breaks when firmware is being installed.
Fastboot Firmware with Mi Flash
This is the basic method for owners of the Snapdragon version, and it allows you to completely rewrite all partitions of memory, including system, boot and user. To start, open the unpacked firmware folder and find the file. flash_all.bat Or just remember the way to the folder.
Put your smartphone into Fastboot mode (clamping Volume Down + Power). Connect it to your computer. Open the Mi Flash Tool. If the drivers are installed correctly, the device's serial number will appear in the top field. Press Refresh button if the list is empty.
In the interface, select Select and select the path to the folder with the unpacked firmware. At the bottom of the window, select the firmware mode. For a clean installation without saving debris, choose clean all. Don't choose clean all and lock unless you are 100% sure of the region's compatibility, otherwise you can get a brick.
| Mode in Mi Flash | Description of action | Risks. |
|---|---|---|
| update | Update with data retention | Possible compatibility errors |
| clean all | Complete cleaning and installation (Recommended) | Loss of all data |
| clean all and lock | Cleaning and locking the loader | High risk of bricks when changing region |
Once you select the mode, press the Flash button, start a recording process that takes 200 to 600 seconds, during which time you can not turn off the cable, when you complete the status, you will see the success label, and the phone will automatically restart. The first download can last up to 10 minutes.
☑️ Checklist before firmware
Installation of Recovery and custom firmware
For those who want to get the most performance and fresh Android, official methods can be limited, and the TWRP (Team Win Recovery Project) custom recovery comes to the rescue, allowing you to install modified systems, make full backups and clear cache.
Installation TWRP It's run through a Fastboot command. Connect the phone in bootloader mode, open the Windows command line (cmd) in the folder with ADB-Type a command to record an image:
fastboot flash recovery twrp-3.x.x-x-kenzo.imgVolume up + Nutrition
Once you log in to the TWRP menu (it will be in Chinese or English), back up your current system (Backup section). Then go to the Wipe section and run Advanced Wipe by selecting Dalvik, Cache, System and Data. Don't erase Internal Storage if there are firmware files in there.
⚠️ Attention: First installation TWRP version MIUI The system can keep the recavators out and download standard Android, so you need to repeat the installation procedure.
To install the firmware itself (ROM), select Install from the main TWRP menu, find the zip archive with the system and confirm the swipe. Once installed, be sure to clean Dalvik/ART Cache from the Wipe menu to avoid cyclical reboots.
Possible errors and methods of their elimination
Flashing is rarely perfectly smooth for all users. Often, drivers are mistaken when a computer sees a device as "Unknown Device." In this case, manually installing drivers through Windows Device Manager, indicating the path to the drivers folder inside the Mi Flash archive, helps.
Flash Error in the Mi Flash Tool is often linked to an antivirus or firewall lock. Try temporarily disabling protection or adding a program to exceptions.
If the phone is gone into an endless restart (bootloop), try logging into Recovery and doing Wipe Data/Factory Reset. If this does not help, you will need to re-flash through Fastboot with a choice of clean all mode. In the worst case, if the device does not respond to buttons, you will have to disassemble the case and close the contacts of test points on the board to enter EDL (Emergency Download) mode.
- 🔌 Connection error: Replace USB-cable or port, use the rear ports of the motherboard.
- ❌ Missmatching image and device: You try to flash firmware from another model.
- 🔋 Power Error: Connect your phone to another power source or replace the battery.
Don't panic if the screen goes out and nothing happens. Press the power button for 15-20 seconds for a forced reboot. The hardware of the Redmi Note 3 is robust enough that software failures rarely cause physical failure unless you force it to interrupt the recording.
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The most common reason for failure is the use of unoriginal USB-- a cable or port with insufficient power. Always use short cables of good quality.