Unofficial unlocking of Xiaomi bootloader: risks, methods and step-by-step instructions

Unlocking the bootloader on Xiaomi smartphones is a theme surrounded by myths and conflicting information. The official path through the Mi Unlock Tool requires waiting 7-30 days, binding the Mi Account and often ends in errors. No wonder users are looking for workarounds. But is the game worth it?

Xiaomi

Anti-Rollback

EDL- Mode

fastboot

We warn you that none of these methods are “safe” in the traditional sense. Even successful unlocking can lead to IMEI blocking, data loss or turning your smartphone into a “brick.” If you are not prepared for these consequences, you should wait for the official unlocker or buy a device with an already unlocked bootloader (for example, the global versions of the POCO F5 or Redmi Note 12 Pro+).

Why Xiaomi is blocking the bootloader and what it threatens the user

Xiaomi has been blocking bootloaders on its devices since 2017, citing security concerns, which means that users cannot:

• 🔄 Install custom firmware (LineageOS, Pixel Experience)
• 🛠️ Get root rights through Magisk or SuperSU
• 🔧 Restore the device via TWRP after a major failure
• 📱 Use alternative cores to accelerate or save charge

The official position of the manufacturer is that blocking protects against viruses, data theft and unauthorized access, but many users see this as a way of control – for example, to force binding to Mi Cloud services or restrict the installation of firmware from third-party developers.

The consequences of unlocking (even official):

• 🚫 Loss of warranty (in most regions)
• 🔒 Risk of blocking Mi Account if suspected of 'illegal' activity
• 📉 Security reduction (malware vulnerability)
• 🔄 Possible problems with OTA-update

⚠️ Warning: On Qualcomm Snapdragon processor devices (e.g., Xiaomi 13 Ultra, POCO F4 GT), unofficially unlocking through EDL can result in a hardware lock IMEI that cannot be restored software-based.

Preparing for Unlocking: What to Do Before Starting

Before you start unlocking, make sure that all the preliminary steps are followed, which minimizes the risks and increases the chances of success.

Make a backup copy of all data (photos, contacts, messages)

Charge your phone at least 60%

Install ADB and Fastboot drivers on PC

Download the current version of the Mi Unlock Tool (even if you plan an informal method)

Disable Find My Device and Mi Cloud Sync in Settings

Check the device model and MIUI version in Settings → About the phone

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Pay special attention to firmware versions. On some devices (e.g. Redmi Note 10 Pro on MIUI 14), informal methods only work on specific builds. Use sites like Xiaomi Firmware Updater to find compatible firmware.

Also prepare an emergency set of tools:

• 🔧 Mi Flash Tool (for recovery via EDL)
• 📱 Fastboot firmware for your model (download only from official sources!)
• 🔌 Cable USB Type-C high quality (cheap cables can interrupt the connection)
• 💻 Windows laptop 10/11 (macOS and Linux may have driver problems)

⚠️ Warning: If your device was purchased in China (a C-suffix version in the model, such as the Redmi K50C), there is a high risk of complete locking after unofficially unlocking.

1 Method: Exploitation of a vulnerability in EDL- Mode (for Snapdragon)

EDL (Emergency Download Mode) is a service mode that allows you to flash the device at a low level without locking the bootloader. On Qualcomm Snapdragon chips, this method remains one of the most reliable, but requires accuracy.

To unlock, you will need:

1. Put your phone in EDL mode (usually by a combination of buttons or via adb reboot edl)
2. Use a modified Mi Flash Tool with a patch to bypass account verification
3. Switch a special firehose file that temporarily disables protection

Detailed instructions:

1. Download the archive with EDL tools (e.g. XiaomiTool V2 or EDL Bypass Tool).
2. Connect your phone to your PC in EDL mode (the screen should be black, without charging indication).
3. Run the command in the terminal: python edl.py --loader=prog_emmc_firehose_8953.mbn --memory=emmc (replace 8953 with your processor code, for example 865 for Snapdragon 865)

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If the phone is not detected in EDL mode, try using the original Xiaomi cable and disconnect all other USB- devices from the PC. Sometimes reconnecting to another USB-port (preferably USB 2.0) helps.

After successful firmware patch bootloader device should boot in fastboot mode with unlocked state. However, this does not guarantee stable operation — there may be problems with sensors, modem or camera.

Method 2: Fastboot bypass with modified commands

This method is suitable for devices on MediaTek (for example, Redmi Note 11, POCO M4 Pro), where EDL is not available or blocked, the essence of the method is to send special commands to fastboot, which temporarily disable signature verification.

Algorithm of action:

1. Transfer the phone to fastboot mode (clip Power + Volume down).
2. Connect to your PC and check the connection with the command: fastboot devices (should display the serial number of the device)
3. Send the command to unlock: fastboot oem unlock-go or (for new devices): fastboot flashing unlock_critical
4. If FAILED error appears (remote: 'Flashing is not allowed'), try the alternative command: fastboot oem unlock 123456789ABCDEF0 (where 123456789ABCDEF0 is a random 16-digit code)

On some devices (e.g. Xiaomi 12T), this method only works after downgrading the firmware to an older version of MIUI. Use Xiaomi Flashable Firmware to find a compatible build.

Successful fastboot unlocking does not usually lead to IMEI blocking, but can cause problems with:

• 📶 Cellular (network loss after reboot)
• 🔋 Fast battery discharge
• 🎮 Sensor operation (gyroscope, compass)

Method 3: Use exploits (for older models)

Devices before 2020 (e.g., Redmi Note 7, Mi 9) sometimes run software vulnerabilities that allow you to unlock the bootloader without official permission.

• 🐄 DirtyCOW (CVE-2016-5195) — for Android 6–9
• 🔓 CVE-2020-0041 — a vulnerability in the Qualcomm core
• 📱 Mi Unlock Bypass is a patched version of the official tool

Example of using DirtyCOW:

1. Download the archive with exploit (for example, DirtyCOW Mi Unlock).
2. Connect your phone in adb mode and start the script: adb push dirtycow /data/local/tmp/ adb shell chmod 777 /data/local/tmp/dirtycow adb shell /data/local/tmp/dirtycow /system/bin/sh
3. After receiving root access, run: echo 1 > /sys/class/devblock/mmcblk0boot0/force_ro dd if=/dev/zero of=/dev/block/mmcblk0boot0 bs=1 count=1024

This method does not work on devices with:

• 🔒 MIUI 12+ and new cores
• 🛡️ The Anti-Rollback function is enabled
• 📱 MediaTek Helio G processors (e.g. Helio G95)

⚠️ Warning: Exploit's often contain malicious code! download files only from trusted sources (e.g., the XDA Developers forum or the high-rated GitHub repository). Before you run, check files through VirusTotal.

What to do if the unlocking failed

If you try to unlock the phone:

• 🔄 Hangs on the MI logo
• 📵 Not turned on (black screen)
• 🚨 This device is locked in fastboot

Don't panic. In 80 percent of cases, the device can be restored.

Recovery methods:

1. Firmware via Mi Flash Tool: Download Fastboot firmware for your model. Select Clean All (not Clean All and Lock!) in the Mi Flash Tool. Connect your phone in fastboot mode and start firmware.
2. Recovery via EDL (if available): Use QFil or Mi Flash Pro with prog_emmc_firehose.elf file. Sweep through the full GPT image and boot.

Contact the service center:

• If self-recovery did not help, contact the authorized Xiaomi service.
• Don’t mention unlocking attempts – say the phone has “renewed itself and stopped turning on.”

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If the phone needs to be logged in to Mi Account after a failed unlock, but you don't remember the password, you can't get access to the device back, and then you just have to get the firmware through EDL with a complete data reset.

Risks and consequences of unofficial unblocking

Even if the unlocking is successful, be prepared for the following problems:

• 🔒 Mi Account Blocking: Xiaomi may block your account for “suspicious activity” by denying access to the cloud and services.

Is it worth the risk? Depends on your goals:

• ✅ Unblocking is justified if: you are an experienced user, need root to work with specialized software, or want to install Google Camera with full support.
• ❌ You shouldn’t risk it if: your phone is your main machine, you’re not prepared for possible data loss, or you can’t recover your device through fastboot/EDL.

Alternatives to unlocking:

• 📱 Buy a device with an unlocked bootloader (e.g., POCO F5 Global or Redmi Note 12 5G).
• 🔧 Use ADB to install applications without root.
• 🔄 Wait for the official unlocker (sometimes it takes only 3-7 days to wait).

FAQ: Answers to Frequent Questions