The process will perform a factory reset and erase all data .
Unlike Xiaomi, OnePlus, or Google Pixel devices, Nokia (HMD Global) does not provide an official bootloader unlock program. In fact, for most Nokia smartphones, HMD has explicitly locked down the bootloader and does not release unlock codes. nokia 3.4 unlock bootloader
The device's bootloader logic contains a vulnerability where, if the boot_a partition is flashed via Fastboot while the device is in a specific state (often related to blankflash or EDL mode protocols transitioned to Fastboot), the Bootloader Verification is not immediately enforced or is bypassed, allowing an unsigned or modified image to boot. The process will perform a factory reset and erase all data