Xiaomi implements a server-side lock flag that requires a specialized tool. Download the official to your PC.
To fix this, you must explicitly unlock the bootloader through Fastboot.
This process will wipe all data on your device. Back up your photos, contacts, and files before proceeding.
If the error returns, a physical limit switch might be stuck closed. Inspect your X, Y, and Z endstops. A stuck switch permanently raises the lock flag. flashing lock flag is locked please unlock it first full
USB drives or external hard drives with hardware encryption (like Kingston DataTraveler) may display this when encryption is enabled [1].
Type cmd in the folder's address bar and press Enter to open a Command Prompt window pre-directed to that folder. Verify connection by typing: fastboot devices Use code with caution.
In the Arduino IDE:
Extract the ZIP archive onto a folder on your computer (e.g., C:\platform-tools ).
This is the most common scenario for this specific error text.
A hard reboot drains residual electricity from capacitors, resetting the lock flag status in volatile memory. This often clears the "full" cache that triggered the lock. Xiaomi implements a server-side lock flag that requires
Open your terminal (Command Prompt on Windows or Terminal on macOS/Linux) and change directories to your folder using: cd C:\platform-tools Use code with caution. Step 3: Authorize Commands in Fastboot Mode
Many users incorrectly assume that toggling the "OEM Unlocking" switch inside the Android UI instantly unlocks the phone. In reality, enabling that switch merely alters the device's get_unlock_ability value from 0 to 1 . This acts as a digital green light, permitting the hardware to accept structural Fastboot commands. If you skip the secondary step of executing the hardware-level unlock command via a PC, Fastboot blocks all image deployments with the "Flashing Lock Flag is locked" error. Phase 1: Preparing the Operating System
This comprehensive guide explains everything you need to know about this error, from its technical meaning to step-by-step solutions. This process will wipe all data on your device