This is the most reliable method for the Nokia 3.4. Services like TechMesto or Hikari Calyx utilize engineering (prototype) bootloader binaries (abl) to bypass security.

A Windows computer (Windows 7 or later) is required for most tools; Linux and macOS are generally not supported for these specific services.

The (codenamed "Doctor Strange") is part of HMD Global's lineup that lacks an official bootloader unlocking mechanism . While standard Android devices often allow unlocking via simple fastboot commands, Nokia devices typically ship with a locked bootloader that does not support these commands by default.