If you repeatedly get DA errors, try using Miracle Box or CM2 (China Miracle 2) which have dynamically adaptable DA loaders. Some versions of SP Flash Tool also require auth_sv5.auth file – place it in the same folder as the DA.
Note your current build number (e.g., BD4j-XQ656AB-RGo-GL-220425V375 ) before flashing to ensure compatibility. tecno bd4j da file