Use volume keys to highlight “UNLOCK THE BOOTLOADER” and press power button to confirm.
fastboot oem device-info Output should show: (bootloader) Device unlocked: true Unlock Bootloader Nokia 3.4
adb devices You should see your device serial number with “device” next to it. Use volume keys to highlight “UNLOCK THE BOOTLOADER”
Now reboot to bootloader:
To verify: Reboot to bootloader again and type: Unlock Bootloader Nokia 3.4
Navigate to the extracted unlock tool folder. Inside, you’ll find a script named unlock_nokia.bat (or similar).