There are some mobiles that the normal SP Flash Tool does not detect, especially when they are dead boot. If the Tecno Pouvoir 2 Air LB6 phone is in such a situation, then the DA file is the only solution that allows it to be identified and flashed. Sometimes we brick the phone in the process of unlocking or resetting someone. Then whenever we connect to the tool, we see the same error. The DA file is a "backdoor" that can bring the SP Flash Tool inside and give life to the mobile, especially in secure phones like Tecno Pouvoir 2 Air LB6.
If Tecno Pouvoir 2 Air LB6 mobile gives an error of "authentication file needed", then use the DA file immediately. This is the authorization that allows you to enter the system without the company. Without it, the flashing tool just stands at the door. When we connect Tecno Pouvoir 2 Air LB6 mobile to the test point and the phone does not give any kind of life, then the DA file is the solution that makes the test point successful. This file allows the system to read and write both.