A locked bootloader verifies the digital signature of the operating system kernel before booting. If the signature does not match the manufacturer's key, the boot process is halted. Unlocking the bootloader involves writing a specific flag to a protected partition (usually frp or a dedicated bootloader partition).
Power off your phone. Unlike normal bootloader mode, SMT requires a hardware trigger: i--- Smt Bootloader Unlock Tool
While these tools are valuable for device recovery, they pose significant security and hardware risks: A locked bootloader verifies the digital signature of
