Samfirm Aio Tool 1.4.3 Added Mtk Auth Bypass Better -

On many Samsung Galaxy devices that use MediaTek processors, this authentication blocks tools like SP Flash Tool, MTK Meta Utility, and even older versions of SamFirm from connecting to the device in bootrom or download mode unless a valid authentication file is provided.

Without diving into proprietary code, here is the logic SamFirm AIO 1.4.3 uses: SamFirm AIO Tool 1.4.3 Added MTK Auth Bypass