Nokia 3.4 Unlock: Bootloader [better]

Unlocking the bootloader on the (codenamed Doctor Strange ) is not officially supported by HMD Global

Since HMD Global blocked official codes, third-party sites like TechMesto offer paid services for the nokia 3.4 unlock bootloader

1. Connect your Nokia 3.4 to your PC via USB.
2. Open the folder where you extracted the Platform Tools (the folder containing adb.exe and fastboot.exe).
3. In the address bar of the folder, type cmd and hit Enter. This will open a Command Prompt window in that directory.
4. Type the following command to ensure your device is connected:

   adb devices
   

   If you see a serial number, you are good to go. If not, check your drivers.
5. Now, boot your phone into Fastboot Mode (Bootloader Mode) by typing:

   adb reboot bootloader
   

   Your phone will reboot into a screen with a robot or text indicating "Fastboot Mode".

• Some Nokia/Android One devices require requesting an unlock key from the vendor. For those:
  • Reboot:

    fastboot reboot
    

  • Re-enable developer options settings as needed.
  • If you plan to install custom recovery (TWRP) or root, follow device-specific images and checksums for Nokia 3.4—always verify images are for the exact model and variant.

  As the Nokia 3.4 reaches its end-of-life for official security updates, the locked bootloader becomes a death sentence for the hardware. Without the ability to install a community-maintained OS, a perfectly functional piece of electronics eventually becomes "e-waste" because it can no longer run modern, secure software. Final Assessment Unlocking the bootloader on the (codenamed Doctor Strange