When you want to remove pattern lock or FRP but your phone gives secure boot error, it clearly means that SP Flash Tool does not have full access. DA file is the key to this full access, which temporarily unlocks the system and frees you from obstacles. Many people think that DA file is only useful during flashing, but in fact it is also necessary for advanced repair. When Tecno B1 Pop 2 mobile gives baseband or modem issue, then DA file can be used to access secure partitions and flash modem.
In phones like Tecno B1 Pop 2, if flashing gets stuck or SP Flash Tool stops at any stage, then in most cases the problem is the absence of the DA file. This is the file that temporarily removes the protection layer of the phone and allows the entire process to complete. When the Tecno B1 Pop 2 mobile turns on only up to the logo and does not move forward, it is a sign of boot loop. If the problem is not being resolved by normal flashing, then it is necessary to bypass secure boot through the DA file and reinstall the entire ROM.