or use your device's specific key combination (usually Power + Volume Down) while booting. Run the Unlock Command
After the device reboots back into Fastboot mode, check the status to ensure the "flag" is no longer locked: fastboot flashing get_unlock_ability (Should return fastboot getvar unlocked (Should return Fairphone Community Forum Troubleshooting "Remote 39" Failures If the command still fails with error code 39:
Most allow unlocking immediately via the standard command unless they are carrier-locked (e.g., Verizon models).
Once in Fastboot mode, use one of the following commands depending on your device's manufacturer:
: In your device's Settings > Developer Options , you must toggle on OEM Unlocking . If this option is greyed out, your device may be carrier-locked or require an internet connection to "check in" with the manufacturer's servers.
The "Failed -Remote 39:Flashing Lock Flag is Locked. Please Unlock it First" error typically arises due to security features implemented in the device's firmware. Manufacturers often include mechanisms to prevent unauthorized or accidental flashing of firmware, which could potentially brick the device or cause it to malfunction. The flashing lock flag is one such mechanism that locks the device, preventing any flash operations until it is explicitly unlocked.
After wait, successfully unlocked. Retry flash:
The ultimate installer creator for Windows. Build professional, compact, and stand-alone self-extracting packages effortlessly. Trusted by developers worldwide for creating fast, reliable installers.
Copyright © G.D.G. Software 2026. All Rights Reserved.
Sign up for our newsletter to receive the latest updates and news about Paquet Builder. No third-party advertisements.