It is officially impossible for the retail version of the Nokia 3.4. HMD Global does not provide an official unlock method (like Motorola or OnePlus) and actively blocks the exploit-based methods (like MTKclient) that work on other MediaTek phones.
Unlocking the bootloader on a (codenamed Doctor Strange or DRS ) is not officially supported by HMD Global. Unlike some other manufacturers, Nokia does not provide an official unlock key or portal for this specific model. nokia 3.4 unlock bootloader
Before attempting any method, ensure you have the following: It is officially impossible for the retail version
The struggle to unlock the Nokia 3.4 highlights the tension between nokia 3.4 unlock bootloader