Often, SP Flash Tool does not detect the mobile due to not including the DA file. Especially if your phone is suffering from dead boot or hard brick, then the DA file is the only way to bring it back to life. Sometimes the mobile connects via USB but disconnects after a few seconds. This behavior occurs when the phone is in security mode. The DA file maintains a constant connection in such a situation so that the flashing can be completed. In phones like Tecno Spark 3 KB7, the flashing process is not just a software update but a sensitive process. If the DA file is not included, the entire process fails. The DA file makes flashing not only possible but also safe.
Did you know that in some phones, if the IMEI or baseband is corrupted, the nvram can be restored only through the DA file? In phones like Tecno Spark 3 KB7, this task cannot be done by common tools unless the DA file is included. By including the DA file, you can not only flash the software but also remove FRP, pattern lock, and system errors. This file has become a basic part of modern flashing, especially for phones based on MediaTek chipset. If you are flashing with SP Flash Tool and you have selected all the firmware but the mobile is not being detected, then chances are that the DA file is missing. This is that invisible tool without which the entire process gets hampered.