The error failed -remote 39-flashing lock flag is locked. please unlock it first is not a bug—it’s a . It protects your device from unauthorized modifications. However, for developers, power users, and custom ROM enthusiasts, it is an obstacle that requires deliberate action to overcome.
If you are seeing this error pop up in your command-line interface—whether you are using fastboot , trying to install a custom ROM, or unbricking a device—you have come to the right place. The error failed -remote 39-flashing lock flag is locked
If this is a printer error, please clarify: and custom ROM enthusiasts
fastboot flash vbmeta vbmeta_null.img --disable-verity --disable-verification trying to install a custom ROM