Xiaomi Fastboot Reflash with Locked bootloader: Official and Unofficial Methods

Firmware Xiaomi smartphones via Fastboot is standard procedure for power users, but what to do if the bootloader is blocked? the manufacturer imposes this restriction to protect against unauthorized changes, but sometimes the firmware is necessary: to restore the "brick", update to the current version MIUI In this article, we will discuss all working ways to bypass the lock, including official Mi Flash tools, exploits for old models and methods using the use of the device. EDL-regime.

It's important to understand that unlocking a bootloader through the official Mi Unlock service requires an account to be tied and waiting 7-15 days, but if there's no time and the smartphone doesn't turn on or malfunctions, alternative methods can save the situation, and we'll look at them with the risks, from the safest to the last measures, which are applied only when the device is completely disabled.

Note: The instructions in the article are relevant for Xiaomi, Redmi and other models. POCO on Qualcomm chips (including Snapdragon) 4xx/6xx/7xx/8xx). For devices on Mediatek (e.g. Redmi Note) 11 or POCO M4 Pro) process is different - separate guidance is required.

Why Xiaomi bootloader is blocked and can it be unlocked without waiting

The bootloader on Xiaomi smartphones has been blocked by default since 2016.

• 🔒 Installations of pirated firmware and hacked software.
• 🛡️ Data theft when you lose your device (without unlocking it is impossible to erase userdata via Fastboot).
• 🔧 Incorrect user actions leading to "bricking".

The official way to unlock is through the Mi Unlock Tool utility, but it requires:

1. Linking your Mi Account to your device (in the Mi Cloud settings).
2. Wait 168 hours (7 days) after the first tether.
3. Connect to the Internet during unblocking.

There are several ways around without waiting:

• 📱 Use of the EDL-mode (emergency firmware via Qualcomm) HS-USB QDLoader 9008).
• 🔓 Exploits for older models (e.g. Redmi Note 3 Pro or Mi 5).
• 🔄 Firmware via Mi Flash with check-bypass (only for some versions) MIUI).

⚠️ Note: Methods of bypassing the lock without official unlocking can lead to loss of warranty, operation of anti-rollback (if you flash the old version) or failure of the eMMC module. 8 Gen 1/2 (for example, Xiaomi 12/13) risk particularly high.

Preparation for firmware: what to do before the start

Before you start the firmware, make sure that:

Install Qualcomm drivers and ADB|Download the correct version of the firmware (Fastboot) ROM)|Charge your phone at least 50 times%|Disable the antivirus (it can block Mi Flash)|Backup your data (if the phone is turned on)

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Drivers and software:

• 🖥️ Official Mi Flash utility (version 2020 or later).
• 🔌 Qualcomm drivers HS-USB (for EDL) and ADB (You can download it via Android SDK).
• 📂 Firmware in.tgz or.zip format (Fastboot only) ROM, not recover!).

Selection of firmware:

Download the firmware strictly for your model from official sources:

• 🌍 Official website MIUI (Choose a Global Region, EEA china).
• 🔗 Xiaomi Firmware Updater (alternative archive with the latest versions).

⚠️ Note: The firmware version lower than the one already installed can activate anti-rollback (backward protection). MIUI 14, firmware MIUI 12 will block the bootloader forever.

3. Check the model and version of the loader:

You can find out the exact model:

• On a box or under a battery (for example, M2007J3SC For the Redmi Note 9 Pro).
• In Fastboot mode: connect your phone to your PC, open cmd and type in: fastboot getvar product

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If the phone is not turned on, but is defined as Qualcomm HS-USB QDLoader 9008 in Device Manager is EDL-It can be used for firmware without unlocking the bootloader.

Method 1: Firmware through Mi Flash with check-bypass (for some models)

This method works on devices with Qualcomm chips and older versions. MIUI (The idea is to exploit a vulnerability in verifying the firmware signature.

Steps:

1. Download Fastboot ROM for its model (for example, tucana_global_images_V12.0.3.0.QFJMIXM_20210310.0000.00_10.0_global_4a8d4b5b8f.tgz).
2. Unpack the archive into a folder without Cyrillic characters (e.g., C:\MIUI\).
3. Launch Mi Flash, press Select and point the path to the firmware folder.
4. Connect your phone in Fastboot mode (clip Volume Down + Power).
5. In Mi Flash, select Clean all or Clean all and lock (if you want to lock the bootloader after you have firmware).
6. Press Flash and wait until it is completed (usually 5-10 minutes).

Possible errors and solutions:

⚠️ Note: On new models (Xiaomi) 12/13, Redmi Note 11/12) This method doesn't work -- Mi Flash requires an unlocked bootloader. EDL or official unlocking.

💡

Firmware through Mi Flash bypassing only works on older models (until 2021) and can lead to data loss. Always backup if the phone turns on!

Method 2: Firmware through EDL-mode (for the blocked loader)

EDL (Emergency Download Mode is a firmware emergency mode that bypasses the bootloader check. It activates when the phone is activated:

• 🔋 Not included (black screen, stuck on the logo).
• 🔄 Loaded on the boot (bootloop).
• 🔌 Defined as Qualcomm HS-USB QDLoader 9008 in Device Manager.

What you need:

• 🖥️ Windows PC (for Mi Flash Pro or QFil).
• 📂 Firmware in.mbn or.elf format (special) EDL-file).
• 🔌 Cable USB Type-C (preferably original).
• 🔧 Qualcomm drivers (you can download here).

Step-by-step:

1. Download. EDL-Firmware for your model (for example, for Redmi Note) 9 Pro — joyeuse_images_V12.0.2.0.QJZMIXM_20210203.0000.00_10.0_global_edl.7z).
2. Unpack the archive and find the file. prog_emmc_firehose.mbn (or similar).
3. Install Qualcomm drivers (if the phone is not defined as QDLoader 9008, use Zadig to replace the driver).
4. Run Mi Flash Pro or QFil, select the.mbn file and start firmware.
5. Wait until the process is completed (it can take up to 20 minutes).

Where to find it. EDL-firmware?

Xiaomi is not officially distributed EDL-files, but they can be found:

• 🔗 On the XDA-Developers forums (look for your model theme).
• 📁 In the archives of Xiaomi Firmware Updater (section) EDL).
• 💬 In telegram chats for repair Xiaomi (for example, @miuiroms).

⚠️ Attention: Firmware through EDL drop off IMEI, MAC-nvram addresses and data. After the procedure, you may need to restore IMEI via the engineering menu (#4636##) or utility like SN Write Tool.

Method 3: Exploits to unlock the bootloader without waiting

For older models (Xiaomi Mi 5, Redmi Note 3 Pro, Mi Max) there are exploits that allow you to unlock the bootloader without a 7-day wait. MIUI bootloader.

The most famous exploits:

• 🔓 DeepFlash for Snapdragon devices 820/821 (Like Mi. 5s, Mi Note 2).
• 🔓 Mi Unlock Bypass – bypasses account verification on some versions MIUI.
• 🔓 EDL Auth Bypass - allows you to move to EDL login.

An example of using DeepFlash:

1. Download DeepFlash and unpack.
2. Connect your phone in Fastboot mode.
3. Run deepflash.exe and select Bypass Mi Account.
4. Follow the instructions on the screen (reboot may be required).
5. After a successful bypass, unlock the bootloader through Mi Unlock without waiting.

Limitations:

• ❌ Does not work on new models (after 2019).
• ❌ Anti-rollback protection can work.
• ❌ Requires technical knowledge (work with the ADB and Fastboot).

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Exploits remove official restrictions, but their use can result in the blocking of your Mi Account or loss of warranty.

Frequent mistakes and their solutions

When you are running through Fastboot or EDL And the problem is that users are facing typical problems:

Remote: device is locked:

So the bootloader is locked and Mi Flash refuses to flash.

• 🔓 Unlock the bootloader officially through Mi Unlock.
• 🔧 Use it. EDL-mode (if the phone is not turned on).
• 🔄 Try flashing through Fastboot with a flag --disable-verity (Only for experienced users).

2. The phone is not defined in Fastboot:

Problems with drivers or cable.

• 🔌 Connection to the rear port USB 2.0 (on the front of the PC may have power problems).
• 🖥️ Are Android Bootloader Interface drivers installed (check in Device Manager).
• 🔄 Try another cable (preferably original from Xiaomi).

3. Anti-rollback error:

It happens when you try to re-read the old version. MIUI. Decisions:

• 📥 Download a newer firmware (check out the version on Xiaomi's website).
• 🔧 Use it. EDL file-wise anti_rollback.db (experience).
• 🚫 If the error has already worked, the device can only be restored in the service center.

4.There is no network after firmware, or IMEI:

A typical problem when running through EDL. Restore IMEI possible:

• 📞 From the Engineering Menu: dial ##4636## → Information → Run ping test.
• 🖥️ With utility tools. SN Write Tool or Maui META (demand EDL).
• 🔧 If IMEI Reset to 0 – contact the service (self-recovery may be illegal).

Data recovery after firmware

Firmware through Fastboot or EDL It usually erases all data from the userdata partition. If the phone was turned on before the firmware, there is a chance of recovery.

Recovery methods:

• 📁 Backup: If you did a backup through Mi Cloud or TWRP, Restore the data after the firmware.
• 🔍 Recovery software: DiskDigger (for photos and videos) Dr.Fone (restores contacts and messages). 7-Data Recovery (working with) ext4 partition).
• 📱 Through ADB: If the phone is turned on but the data is erased, try: adb pull /sdcard/ C:\Backup\ (Copy files from internal memory to PC).

⚠️ Note: If the firmware was run due to bootloop or system damage, the chances of data recovery are minimal).

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Before the firmware, remove the memory card (if any) – the data on it will not be affected, and you can copy important files to the PC.

FAQ: Answers to Frequent Questions