For now, you hold an unlocked device in your hands, and the possibilities are endless.
Disclaimer: This process will wipe all data, void the warranty, and may brick the device if done incorrectly. Proceed at your own risk. Your Nokia 3.4 has served you well—stock Android, clean interface, monthly security patches. But lately, you’ve felt the itch for more: custom ROMs, root access, kernel tweaks, or just removing bloatware that even Nokia couldn’t hide.
adb reboot bootloader The phone screen goes black, then shows the screen — a tiny white text on a black background.
Verify fastboot connection:
Use volume keys to highlight “UNLOCK THE BOOTLOADER” and press power button to confirm.
On your PC, open a command prompt in the platform-tools folder and type:
Navigate to the extracted unlock tool folder. Inside, you’ll find a script named unlock_nokia.bat (or similar). Unlock Bootloader Nokia 3.4
Run it (right-click → Run as administrator).
Now reboot to bootloader:
To verify: Reboot to bootloader again and type: For now, you hold an unlocked device in
fastboot devices Again, your device serial appears. Good. Most Nokia phones would stop here, showing fastboot oem unlock as “not allowed”. But your Nokia 3.4 has a secret: an engineering bootloader exploit.
The gatekeeper to this freedom is the . Nokia (HMD Global), unlike Google Pixels or OnePlus devices, does not officially provide an unlock method for most of its phones. The Nokia 3.4 is no exception. But the modding community found a backdoor — an unofficial exploit via a tool called Nokia Bootloader Unlock .
adb devices You should see your device serial number with “device” next to it. Your Nokia 3