Failed -remote 39-flashing Lock Flag Is Locked. Please Unlock It First 39-- //top\\ | EXTENDED — 2027 |

The flag prevents malicious software, unauthorized updates, or physical thieves from modifying your core operating system files.

To solve this problem, we need to break down exactly what the Fastboot binary and your device’s bootloader are communicating.

How to Fix "FAILED (remote: 'flashing lock flag is locked. please unlock it first')"

This error frequently occurs when developers or enthusiasts attempt to flash custom operating systems, such as installing Ubuntu Touch on tablets like the JingPad A1 Go to product viewer dialog for this item.

The lock flag is often tied to a server-side timer for Xiaomi. Patience is required. please unlock it first')" This error frequently occurs

Scroll down to find . Flip the toggle switch to ON .

This error is a clear signal from the hardware or its bootloader (the low-level software that starts up the device) that a has been set. It is refusing to proceed until you deliberately and correctly remove this protection. Encountering this error is a common milestone in Android customization and, less frequently, in professional firmware development for embedded systems.

Use the physical to select "Unlock the bootloader" . Press the physical Power button to validate the choice.

The exact command depends on your device manufacturer. Below are the most common methods. Scroll down to find

This error is a definitive sign that, despite your intentions, the protection mechanism is still active and is blocking the operation.

# Download and compile the tool, then run it to unlock the entire chip ./unlock_spi_winbond

python mtk.py unlock

Modding an Android device by flashing custom ROMs, custom recoveries, or official firmware packages is an excellent way to extend the lifecycle of your phone or tablet. However, the process rarely goes without a hitch, and Android’s security mechanisms can sometimes halt your progress. your bootloader was re-locked.

The Android operating system possesses a software flag named get_unlock_ability . If this is set to 0 inside your developer settings, the hardware layer rejects all remote entry commands from external terminal platforms.

Certain official firmware flashing tools (like Mi Flash Tool or Realme Flash Tool) have a default setting enabled called "Clean all and lock." If you previously flashed a rom using this setting, your bootloader was re-locked.

Tap the seven consecutive times until a notification states you are a developer.