Xiaomi Redmi Note 9 Pro firmware through 4PDA: the complete guide from A to Z

Why to Switch Redmi Note 9 Pro and What You Need

Xiaomi Redmi Note 9 Pro firmware (codename joyeuse) is a process that can radically change the way your smartphone works. Whether you want to get rid of advertising in MIUI, install a fresh version of Android, restore the "brick" after an unsuccessful update or just experiment with custom firmware like Pixel Experience or LineageOS - you can not do without the right instructions. The 4PDA forum focuses most of the current firmware, tools and discussions, but it can be difficult for a beginner to understand them.

This article is not just a retelling of instructions from the forum, but a structured guide to the typical user errors, and we will look at all the steps from unlocking the bootloader to choosing between Fastboot, Recovery and the other steps. EDL-It is important to know how to avoid common problems such as anti-rollback error or hanging on the Mi logo. It is important: the procedure requires care - one wrong step can turn your smartphone into a brick".

Before you start, check:

• 🔋 Battery charge of at least 60% (better than 80%).
• 💻 Availability of a Windows PC 7/10/11 (Some tools need drivers).
• 🔌 Original. USB-cable (cheap often don't transfer data to Fastboot).
• 📥 Backup data (firmware erases everything, including photos and messages).

Step 1: Unlock the bootloader – without it anywhere

Xiaomi’s bootloader is locked by default, and this is the main obstacle to the firmware. Unlocking officially through the Mi Unlock Tool takes 7 days of waiting (if the Mi Account is tied to the device for more than 30 days). Alternative methods like EDL or bypassing through 4PDA exist, but there are risks from loss of warranty to complete loss of device health.

Official instruction:

1. Download the Mi Unlock Tool from Xiaomi.
2. Enable Developer Options (click 7 times on the MIUI version in Settings → About Phone).
3. Activate. OEM-unlocking and debugging USB In Settings → Additionally. → For developers.
4. Link your Mi Account to your device in Settings → Xiaomi Account → Mi Cloud.
5. Run the Mi Unlock Tool on PC, log in and follow the hints.

⚠️ If you see a "Couldn't unlock" or "Device not connected" error, check it out: 🔌 Cable and port USB (Try another port on the PC). 🔄 Restart your phone to Fastboot manually (clip the power) + Loudness down). 🛡️ Disable the antivirus, it can block the Mi Unlock Tool.

Step 2: Select firmware - MIUI, caste or stock?

There are three types of firmware available for the Redmi Note 9 Pro on 4PDA:

• 📱 Officially MIUI (stable/weekly) – to restore or update.
• 🛠️ Custom firmware (Pixel Experience, LineageOS, ArrowOS) – for pure Android without advertising.
• 🔄 Firmware port (e.g, MIUI from other regions, for experiments.

For beginners, we recommend starting with the official firmware through Fastboot. Castom firmware requires an installed TWRP and unlocked bootloader, and is fraught with bugs (for example, a broken NFC or camera).

⚠️ Attention: Firmware with 4PDA often modified — check the reviews in the topic before downloading. MIUI They may contain viruses or mining scripts preinstalled (especially from unofficial sources.

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Before you run the firmware, check the version of your device in Settings → About Phone → MIUI version. You can only flash it to the same or newer version (the anti-rollback rule).

Step 3: Tool Preparation – What to Download and How to Install

To run through Fastboot, you will need:

• 🖥️ ADB Fastboot Tools by Google.
• 📁 Firmware for your model (download from the topic to the topic) 4PDA).
• 🔧 Driver for Fastboot/EDL (If Windows does not recognize the device).

Installation instructions ADB/Fastboot:

1. Download platform-tools and unpack to the root of the C:\ drive (e.g., C:\platform-tools).
2. Add path to folder to environment variables: This computer → Properties → Additional system settings → Environment variables → Path → Add "C:\platform-tools"
3. Check the team’s work in CMD: fastboot devices (the serial number of the device should be displayed).

If you are flashing the Redmi Note 9 Pro (model M2003J6A1G), do not use the firmware for the Redmi Note 9S (model M2003J6B1G) – this will lead to a “brick” due to different hardware configurations.

Step 4: Fastboot Firmware – Step-by-step instruction

This is the most reliable way to flash the Redmi Note 9 Pro if the bootloader is unlocked.

Procedure:

1. Turn your phone into Fastboot: adb reboot bootloader or press Power + Volume down when the phone is off.
2. Connect your device to your PC and check for detection: fastboot devices
3. Unpack the downloaded firmware (should be a file) flash_all.bat).
4. Run the firmware: flash_all.bat (If the script does not start, use the command manually: fastboot flash boot boot.img fastboot flash system system.img... fastboot reboot )

⚠️ Warning: If the process is interrupted during flashing vbmeta, don't panic -- that's OK for some firmware. But if the phone doesn't turn on after the reboot, you'll have to use it. EDL-regime (see next section).

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Fastboot firmware erases all data! If you need to save files, use backup via adb pull /sdcard before the process begins.

Step 5: Firmware through EDL – When Fastboot is not working

EDL (Emergency Download Mode) is a mode for restoring bricks when the phone is not turned on or detected in the Fastboot. For the Redmi Note 9 Pro, this method requires a special cable (EDL-cable) or short circuit test points on the board.

⚠️ Warning: Use of EDL Without official permission, Xiaomi may be blocked. IMEI. Nana 4PDA There are patched versions of the Mi Flash Tool that bypass this protection, but the risk remains.

Instructions:

1. Download the Mi Flash Tool (EDL version).
2. Unpack the firmware in a folder without Cyrillic (for example, C:\MIUI\joyeuse).
3. Transfer the phone to EDL: 🔌 Method 1: Use EDL-cable (close contacts to the EDL-cable) USB-plug). 🔧 Method 2: Disassemble the phone and close the test points (requires a soldering iron).

Mi Flash Tool

Refresh

COM-port

Flash

Important! Once you've run your EDL firmware, your phone may require authorization to the Mi Cloud, and if you've forgotten your account information, it's going to be extremely difficult to unlock the device.

Step 6: Install TWRP and custom firmware

To install Pixel Experience, LineageOS or other custom firmware, you need TWRP Recovery. There is no official TWRP for the Redmi Note 9 Pro, but there are unofficial builds on the 4PDA.

Instructions:

1. Download TWRP for joyeuse (check out the version!).
2. Fastboot: fastboot flash recovery twrp.img fastboot reboot recovery
3. In TWRP, make a backup of the persist partition (important for IMEI!).
4. Sweat the custom firmware (for example, PixelExperience_joyeuse-13.0.zip) via Install TWRP.
5. After installation, scrolle Magisk (if you need a root) and Disable Force Encryption (to avoid hanging out).

FAQ: Frequent questions about the Redmi Note firmware 9 Pro