Before proceeding, you must understand that unlocking the bootloader modifies deep system parameters.

Because HMD Global blocks traditional fastboot unlocking, the most reliable method for modern firmware involves putting the phone into and using specialized service tools (like Hydra Tool, InfinityBox, or Miracle Box).

The Nokia 3.4 utilizes a Qualcomm Snapdragon 460 chipset. Unlike some manufacturers who provide official unlock codes via a developer portal, HMD Global does not officially support bootloader unlocking for the Nokia 3.4.

Use the tool to read the config or frp partitions, or execute the tool's built-in "Unlock Bootloader" script which rewrites the bootloader flag from locked ( 0 ) to unlocked ( 1 ).

Some generic service tools claim support for Nokia HMD devices, though their success rate on the 3.4 specifically can vary based on security patch levels: Phoenix Service Tool

To unlock it, you must rely on third-party developers or specific exploit tools that bypass HMD Global's security signatures. Method 1: Unlocking via Third-Party Tools (EDL Mode)

For the average user, the risks far outweigh the benefits. For the determined developer, the journey is a minefield that requires deep technical knowledge, a high tolerance for failure, and the acceptance that the device may never recover. If you choose to proceed, do so at your own risk, and always follow the instructions provided by trusted community members like those on XDA Developers.

Type the following command to ensure your PC detects the phone: fastboot devices Use code with caution.

Put the phone back into (Volume Down + Power while plugging in USB). Open Command Prompt in your platform-tools folder. Run the command: fastboot oem device-info Use code with caution.

Do you need help finding the to keep as a backup? Let me know how you want to proceed with your Nokia 3.4. Share public link