Modern MediaTek chips (Dimensity 1100/1200 – MT6893) introduced and DAA (Download Agent Authentication) . This prevents unauthorized flashing. If you get a “BROM ERROR: SLA/DAA” message, the standard SP Flash Tool will fail.
Obtain the correct for your specific device model. A Scatter file is a text file that tells the flash tool where to place each partition (boot, system, vendor, etc.) in the memory. mt6893 flash tool