even when preloader partition is corrupted – tested on Redmi Note 11S.
Wait for the utility to show "Protection disabled" or a similar success message. : Launch flash_tool.exe as an Administrator. mt6781 sp flash tool exclusive
Never use Format All + Download unless you have a full Read Back of your original flash memory saved as a ROM_0.bin file. even when preloader partition is corrupted – tested
Call to action: Comment with your device model and current issue for help choosing the right ROM and step-by-step guidance. mt6781 sp flash tool exclusive