Follow these steps to flash your device using the SP Flash Tool : Help with flashing stock ROM on Nokia 3.1 (Mediatek MT6750)
: Verified stock ROMs for the Nokia 3.1 (MT6750) are available on NeedROM . Users report that flashing in "Firmware Upgrade" mode—while unchecking the preloader, sutinfo, systeminfo, and cda boxes—works for updating or fixing devices. nokia 31 scatter file verified