: If the command fails, ensure you have enabled OEM Unlocking and USB Debugging in the "Developer Options" menu within the phone's settings.
Once the device reboots (or you manually boot back into fastboot), verify that the lock flag is gone by typing: fastboot getvar unlocked : If the command fails, ensure you have
: These often require a unique "Unlock Code" obtained from the manufacturer's website. : If the command fails
I ran into the dreaded error: failed - remote 39 - flashing lock flag is locked. please unlock it first : If the command fails, ensure you have
The "Failed -Remote 39:Flashing Lock Flag is Locked. Please Unlock it First" error implies that any attempt to flash or update the device's firmware will be blocked until the lock flag is cleared. This can be particularly problematic for: