Itel A15 If the mobile is only in test mode and does not go to normal boot, it is a deep software crash. The DA file bypasses the system and allows the flash tool to write directly, which makes the boot usable again. When the mobile fails midway during flashing, partially written partitions can brick the mobile. The DA file not only re-detects the mobile but also completes the incomplete flashing.
The DA file is actually the master access file that allows tools to access parts of the Itel A15 mobile that are inaccessible to the average user. Without it, neither NVRAM can be written nor custom recovery installed. If SP Tool shows device not found in Itel A15 mobile, the first step is to add the DA file. This file initiates USB communication, after which the flashing process completes without any error.