Always keep a backup of the nvdata , protect1 , and seccfg partitions before any write operation on MT6833. Use --read in SP Flash Tool portable mode first.
Execute flash_tool.exe inside the extracted portable folder. mt6833 flash tool portable
In the field, click choose and navigate to your extracted firmware folder. Select MT6833_Android_scatter.txt . Always keep a backup of the nvdata ,
Download the latest portable version of the tool. mt6833 flash tool portable