The and Redmi Note 9 have extra security:
SP Flash Tool is a Windows-based utility developed by MediaTek. It communicates with the built-in BootROM of MediaTek processors via a specific USB protocol (BROM or Preloader). Unlike recovery-based flashing (TWRP), SP Flash Tool can write to partitions even when: sp flash tool for xiaomi mtk mt6765 mt6785
Always use official MIUI Fastboot ROMs. Trusting modified firmware from unofficial forums for these particular chipsets often leads to BROM authentication errors that are impossible to bypass without paid tools. The and Redmi Note 9 have extra security: