Re-install the Samsung USB Drivers and try again. Important Safety Note
Ensure you are using the correct firmware version. Downgrading to an older version than what was previously installed can often cause a "Binary Check" fail. samsung schw279 flash file
Ensure that "Auto Reboot" and "F. Reset Time" are checked in the Options tab. Do not check "Re-partition." Re-install the Samsung USB Drivers and try again
Press and hold the buttons simultaneously. samsung schw279 flash file
For older Samsung feature phones, you typically use Odin or specialized Samsung CDMA flashing tools.
Download the official Samsung SCH-W279 firmware from a reliable repository. Ensure the file matches your region (e.g., India/INU).
This usually means a driver issue. Try a different USB port (preferably on the back of the PC) or a different cable.