Sometimes you just need to wipe the mobile but if it is FRP locked then that is not possible. DA file in such a case gives SP Flash Tool access to FRP area so that it can be removed. The importance of DA file is understood when you have tried every possible method and still the mobile does not revive. This file gives a new life to mobiles like Tecno SA1S and makes flashing very easy, safe and effective.
If your Tecno SA1S mobile has suddenly gone silent and is not responding even from USB, then it is most likely that it has become a victim of dead boot. In such a case, the DA file is the secret key that opens the locked doors of the MediaTek system and gives the flash tool access to the system. If you do not have this file, neither the file will load nor the phone will turn on again.