Click on "choose" next to the Download-Agent line. By default, SP Flash Tool uses MTK_AllInOne_DA.bin . Replace this by browsing to and selecting your downloaded custom Tecno_BD3_DA.bin file.
Whether you are upgrading your Android version, downgrading to fix bugs, or simply refreshing a sluggish system, flashing a complete stock ROM requires a DA file to grant permission to overwrite system partitions. 🛠️ 3. Unbricking Dead Devices tecno bd3 da file
What are you trying to fix on your Tecno BD3? Do you know the MediaTek processor model of your device? Click on "choose" next to the Download-Agent line