Xiaomi Redmi firmware: official and custom methods with unlocking the bootloader

Xiaomi Redmi’s firmware is a process that can bring a device back to life after crashes and unlock new features through custom builds. However, the wrong actions often turn the phone into a “brick”, especially if you ignore unlocking the bootloader or use incompatible files. In this article, we will analyze all the current methods of firmware — from official updates through MIUI Updater to manual installation through Fastboot and TWRP, taking into account the nuances for different Redmi models (Note 12, 11, 10, 9, etc.).

It’s important to understand that the procedure for the 2020-2026 Redmi is different from older devices (until 2019) due to changes in Xiaomi’s bootloader unlock policy. We focus on safe methods that minimize risks but do not guarantee 100% success – much depends on the model, MIUI version and even the firmware region. If your goal is to just upgrade the system, start with the first partition. If you need custom firmware or crash recovery, go to Fastboot or EDL.

Warning: Xiaomi officially bans firmware through uncertified methods (e.g., EDL without an authorized account) This can result in IMEI blocking or loss of warranty.

1. Firmware Preparation: What to Do Before Starting

The first step is to determine the current MIUI and the Redmi model. To do this, go to Settings → About the phone.

• 📱 Device model (e.g. Redmi Note 12 Pro)+ 5G or POCO X5 Pro – This is important for choosing a firmware).
• 🔢 Version. MIUI (for example, MIUI 14.0.5.0 or HyperOS 1.0.2.0).
• 🔓 bootloader status: blocked or unlocked (checked by the fastboot oem device-info command).

Next, prepare:

• 💻 Windows computer 10/11 (for Fastboot/EDL) or Linux/macOS (for ADB).
• 🔌 Cable USB Type-C (original or high-quality – cheap cables can interrupt data transmission).
• 🔋 Battery charge of at least 60% (when running through Recovery, the phone should not turn off).
• 📁 Backup of data (firmware erases internal memory in most cases!).

⚠️ Note: If your Redmi is purchased in China (market version) CN), firmware MIUI can block the network due to differences in modem files. check compatibility on the forum Xiaomi.eu.

2. Official update via MIUI Updater (without unlocking)

The safest way is to update through the built-in System Update (MIUI Updater) application.

• 📲 Transition to the new version MIUI/HyperOS data-free.
• 🔄 Recovery after minor failures (if the system is booted).
• 🌍 Changes in the firmware region (e.g., with CN Global, if available for your model).

Instructions:

1. Open Settings → Update the system.
2. Click on the icon. ⋮ (three-point) → Select a Service Package.
3. Specify the path to the downloaded firmware file (.zip format, the name should contain the model, for example, toco_global_images_V14.0.4.0.TMOMIXM_20231010.0000.00_12.0_global.zip).
4. Confirm the installation and wait for the restart (it will take 5-15 minutes).

Where to download the official firmware:

• 🌐 Official website MIUI (Choose Recovery. ROM for this method).
• 🔗 Xiaomi Firmware Updater (alternative source with archived versions).

⚠️ Note: If after the update the phone is stuck on the logo MI, Wait 20 to 30 minutes. If it doesn't work, go to the Fastboot method (section 4).

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Before updating, disable reset protection (Settings → Passwords & Security → Reset Protection) this will prevent blocking after firmware.

3. Unlocking the bootloader: a must-do step for Fastboot and TWRP

Without unlocking the bootloader, you can’t flash Redmi through Fastboot or install custom Recovery (such as TWRP). Xiaomi requires confirmation of the Mi Account associated with the device. The process takes 7-15 days (from 2023, the term is increased).

Step-by-step:

1. Link Mi Account to your phone (Settings → Xiaomi Account).
2. Activate OEM Unlock and USB Debugging (Settings → Additional → For Developers).
3. Connect Redmi to your PC and execute in ADB: adb reboot bootloader fastboot oem unlock
4. Follow the instructions on the phone screen (confirmation via SMS/email is required).
5. After unlocking the phone will perform a reset to factory settings!

Limitations:

• ⏳ S 2026 Xiaomi blocks unlocking for some models (e.g. Redmi Note) 12 turbo POCO F5) regionally CN/IN.
• 🔒 On devices with HyperOS may require additional confirmation through the Mi Unlock application (download on the official website).

💡

Unlocking the bootloader erases all data from the phone. Make a backup in advance!

4.Fastboot Firmware: A Universal Method for All Redmis

The Fastboot method is suitable for:

• 🔄 Recovery after the brick (if the phone is not turned on, but is determined by the PC).
• 📥 Official firmware installations with full reset.
• 🔓 Flipping after unlocking the loader.

Tools required:

• 🖥️ Official Fastboot firmware ROM (file.tgz or.zip).
• 🛠️ Platform Tools (ADB & Fastboot by Google.
• 🔧 Archivator for unpacking firmware (for example, 7-Zip).

Instructions:

1. Unpack the firmware in the folder from fastboot (files should appear) images/ and flash_all.bat).
2. Transfer the phone to Fastboot mode: turn off, then press Volume down + Power.
3. Connect to the PC and launch it. flash_all.bat (for Windows) or run in the terminal: fastboot flash boot boot.img fastboot flash system system.img fastboot flash vendor vendor.img fastboot flash recovery recovery.img fastboot reboot

⚠️ Warning: If the firmware is interrupted and the phone is not turned on, try repeating the process or using it. EDL (section 6). Don't turn it off. USB-cable system.img — This is the longest stage!

5. Install custom firmware through TWRP

Custom firmware (such as LineageOS, Pixel Experience or Xiaomi.eu) provide advanced features, but require:

• 🔓 Unlocked loader.
• 📱 Established TWRP Recovery (unofficial for most Redmi 2022–2026).
• 🛡️ Disabled Anti-Rollback (for older models, for example, Redmi Note 7).

Step-by-step instructions for Xiaomi.eu:

1. Download TWRP for your model from the official website or XDA.
2. Install. TWRP Fastboot: Fastboot Flash Recovery twrp-3.7.0_12-1-toco.img fastboot reboot recovery
3. In TWRP, run Wipe → Format Data (required for HyperOS!).
4. Transfer the firmware (.zip) to your phone and install it via Install.

Popular custom firmware for Redmi:

• 🌍 Xiaomi.eu – Optimized MIUI softwareless.
• 🤖 LineageOS – pure Android without a shell Xiaomi.
• 📱 Pixel Experience – The interface is like Google Pixel.

6.Firmware through EDL: The extreme method for "bricks"

EDL (Emergency Download Mode) is a mode for recovering devices that do not respond to Fastboot.

• 🔌 Special cable (EDL cable) or circuits of the circuit board.
• 💻 Mi Flash Tool (official) or QFil (for Qualcomm).
• 🔐 Authorized Xiaomi Account (for new models).

Instructions for Mi Flash Tool:

1. Download Mi Flash Tool and Fastboot firmware.
2. Transfer your phone to EDL: adb reboot edl If it doesn’t work, close the Test Point contacts (see instructions for your 4PDA model).
3. In the Mi Flash Tool, select firmware and press Refresh → Flash.

⚠️ Attention: Firmware through EDL Without authorization, it can be blocked. IMEI device-wise 2023–2026 year of release (for example, Redmi Note) 12/13). Use this method only if other methods do not help!

7. Solving firmware errors

Common problems and ways to eliminate them:

If the IMEI is missing or the network is not working:

1. Check if the firmware matches the phone region (Global/CN/IN).
2. Restore nvram via TWRP (if there is a backup).
3. Contact the service center – self-restore IMEI may be illegal.

FAQ: Frequent questions about Xiaomi Redmi firmware