Unlock Xiaomi bootloader

The bootloader is the program that runs first when the phone powers on and loads the operating system. By default it is locked on Xiaomi: the device only agrees to boot official firmware signed by the manufacturer. Unlocking removes this restriction and opens access to fastboot ROMs, custom recovery and system modifications.

Why unlock the bootloader

• Install a fastboot ROM to recover a bricked device.
• Switch to a different regional firmware.
• Install custom recovery (TWRP) and custom ROMs.
• Gain root access.

Official method: Mi Unlock

Xiaomi provides its own Mi Unlock tool for Windows. The procedure is official but requires waiting: the company enforces a binding period between the account and the device — from a few hours to 7 days depending on model and region.

Step 1. Preparation

1. Create a Mi Account and sign in on the phone.
2. Insert a SIM card and enable mobile data (sometimes required for binding).
3. Enable Developer mode: Settings → About phone → tap the version number several times.
4. In developer settings find "Mi Unlock status" and bind the account to the device.

Step 2. Waiting

The countdown starts after binding. Do not sign out of the Mi Account during this period, or the timer may reset.

Step 3. Unlock

1. Download the official Mi Unlock Tool to your computer.
2. Power off the phone and enter Fastboot mode (Volume Down + Power).
3. Connect the phone, sign in to Mi Unlock with the same account and click Unlock.
4. Wait for completion — data will be erased.

After unlocking

You can now install fastboot ROMs and modifications. If you decide to re-lock, remember: re-locking with third-party firmware can brick the device, so only lock the bootloader on official firmware.

Conclusion

Unlocking the bootloader is a required step for fastboot flashing and modifications on Xiaomi. Use only the official Mi Unlock, be patient during the waiting period, and back up your data first. After unlocking, download the fastboot image for your model from the ZFirm.me catalog.