Sometimes errors like unknown baseband and null IMEI start appearing on Alcatel Pixi 4 OT-4034 mobile. You insert the SIM but no signal comes, check IMEI and it is empty. Now this problem is not solved by flashing only because IMEI is related to modem partitions which are often protected. DA Auth File here enables you to access modem, nvram and nvdata partitions and repair them again. Without this file you will see error: “permission denied” or “unauthorized write attempt.” DA file is a secure access bridge, which allows tools to replace encrypted modem configuration and rewrite sensitive data like IMEI. It is used very carefully because the wrong file can completely kill the mobile..
Alcatel Pixi 4 OT-4034 FRP lock of mobile sometimes becomes the biggest test. Especially when the mobile is reset and starts asking for a Google account that the user does not remember. At that time, no call can come, no message, and no mobile can be used. DA Auth File is the only solution to bypass all these security layers. It gives file tools access at superuser level from which the FRP partition can be cleaned. An experienced technician loads the DA file, puts the mobile in brom mode, and zeroes the FRP section and brings the mobile back as if it was bought new. This is a delicate process in which if file compatibility is not taken care of, the mobile may never turn on.