If you cannot perform a full flash, you may try these built-in reset codes directly on the keypad:

Ensure you select the files in the correct order (usually designated by the tool's slots for binary files).

Download the latest drivers from the Samsung Support page .

Restart your device and follow the on-screen instructions to complete the setup process.

Standard Samsung Mobile USB drivers are necessary for your PC to recognize the phone. These can often be found on the Samsung Support site via the Kies software or as standalone packages from Solvusoft . YouTube·SSTec Tutorials

The literal "soul" of the phone. He sought out the original stock firmware, often labeled as C3520XXKJ7

A flash file is the base operating system software for your phone. For the GT-C3520, which runs on a proprietary RTOS (Real-Time Operating System) rather than Android, the firmware controls everything from button response to network registration. The official flash file contains: