If you've followed the above steps but the "OEM Unlocking" toggle is permanently grayed out or missing, your device is running a bootloader version that has received the security patch. However, all is not lost for the determined user. Advanced enthusiasts have developed workarounds, though they come with significant risks.
: Modifying critical partitions without an authorized cryptographic signature results in immediate boot loops or a hard "System Destroyed" validation error. se bootloader unlocking relocking 1662 patched