In the context of mobile phone repair, a "DA File" usually refers to a Database File used to fix a device that is dead or bricked. It is essentially a full backup of the phone's firmware (Bootloader, Preloader, etc.) used to revive the phone using tools like SP Flash Tool or CM2.
If you’ve come across the term "Tecno B1C DA file", you’re likely dealing with firmware flashing or repair procedures for a Tecno device. However, Tecno Mobile has no officially listed model named "B1C." The closest possibilities include:
Before downloading any files, verify your device matches these hardware specs to avoid permanent damage: Tecno Pop 2F (B1c) - DeviceAtlas
Connect the powered-off phone to the PC via USB. The tool should detect the device and begin the process using the DA file to bypass secure boot security. Alternative: Resetting Without a PC