Sometimes Itel A45 mobiles get into boot loop during software update. The mobile restarts repeatedly but does not turn on. To avoid this serious problem, using DA file becomes inevitable. Because normal firmware cannot break this boot loop, unless secure boot unlock is done through DA file. Some models of Itel A45 mobiles are so secure that installing firmware on them is like opening a locked door without a key. DA file is actually the special key that allows the flash tool to unlock this door. This file bypasses the bootloader and allows the tools to make changes to every part of the mobile.
Whenever a user tries to remove FRP lock in Itel A45 mobile and fails, it means that the mobile has blocked external tools. DA file allows SP Tool to access and erase FRP partition, even if USB debugging is not enabled in the mobile. If the error "status_sec_auth_file_needed" occurs in Itel A45 mobile, it indicates that the mobile has rejected external flashing. DA file intervenes at this point and makes the mobile firmware "trusted" and accepted, so that the system software can be installed easily.