The official proprietary tool used by Samsung for flashing firmware. Samsung USB Drivers:
If the PC doesn't see the phone, try a different USB port (preferably on the back of the PC) or a different USB cable. samsung schw279 flash file
Follow the instructions exactly, and the risk is low (under 5%). The official proprietary tool used by Samsung for
If the process stops midway, ensure you are using the correct version of the flash tool and that the battery is sufficiently charged. samsung schw279 flash file
The progress bar will begin moving. Do not touch the phone or cable. Once the process reaches 100%, the tool will display a "Passed" or "Success" message. The phone may reboot automatically.