Samsung Gt-c3520 Flash File And Tool

| Issue | Likely Fix | |-------|-------------| | No COM port | Reinstall driver; try different USB port or cable. | | Stuck at “Downloading” | Restart phone and PC; ensure correct firmware version. | | Phone still dead after flash | Battery not charged; hardware issue (eMMC failure). | | “BIN file mismatch” | Wrong flash file – download exact C3520 firmware (check product code on sticker under battery). |