When your Alcatel Tetra 5041C mobile gets stuck on the logo every time you turn it on, a common user thinks that maybe there is a battery problem or a virus has entered the phone. He presses the power button dozens of times, sometimes connects the charger, sometimes tries to open recovery with the volume buttons, but every time he fails. In fact, such problems mostly arise when the system partition becomes corrupt or a software update is not completely installed. Now here comes the role of the DA Auth File. This file is what gives a tool like SP Flash Tool access to the security system from where the actual flashing is possible. It is just like having a strong lock inside your house, and the DA File is the key that only authorized people have. When this key is found by your flash tool, then it can go deep into the mobile, reset the system and bring the mobile back to its original state..
Alcatel Tetra 5041C If there is any software issue in the mobile — be it IMEI gone, baseband unknown, camera not opening or device not booting at all — if secure boot is enabled, no tool will work unless you add the DA Auth File. This file technically completes a handshake protocol between the tools and the mobile, which makes the secure partitions accessible. Every technician has a collection of DA files from different mobile brands, which is a testament to his experience.