The error message is a security safety mechanism on Android devices, particularly those with Unisoc or Spreadtrum chipsets, that prevents any modifications to the system partitions while the bootloader is in a "locked" state. What This Error Means
If the standard commands fail, your device may require a proprietary tool: Fix Device State Locked Unlockable in Fastboot Mode flashing lock flag is locked please unlock it first full
A normal lock is either active or released. A "flashing" lock indicates the lock is in an inconsistent state—often because the work process holding it has terminated but the cleanup routine failed. In such cases, the lock remains visible to the system but cannot be cleared by normal means (e.g., ending a transaction). "remote: Flashing Lock Flag is locked


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