For now, you hold an unlocked device in your hands, and the possibilities are endless.
Now reboot to bootloader:
adb devices You should see your device serial number with “device” next to it. Unlock Bootloader Nokia 3.4
adb reboot bootloader The phone screen goes black, then shows the screen — a tiny white text on a black background.
But one day, a critical security patch arrives. You can’t install it normally. You have to re-lock the bootloader — which requires flashing stock firmware first. That’s another story. 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.
To verify: Reboot to bootloader again and type: But one day, a critical security patch arrives
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 .