Samsung Gtc3520 Flash File And Tool -

The tool should automatically detect the device and start the process. Wait until the status bar turns green, indicating the process is complete. Alternative: Factory Reset

Flashing will always fix a dead phone. Truth: If the phone doesn’t power on at all (no vibration, no display), the hardware is likely dead (bad battery connector, blown PMIC, or dead CPU). Flashing requires a powered-down but alive phone.