Flashing tools lets you flash your mobiles via a USB data cable with connecting flashing boxes. It is the same way for you to flash mobiles with tools like flashing with boxes. So, first of all, you will need to download the latest flash files of your mobile and then put those flash files in one specific folder because during flashing you should find them easily.
Now you can download the latest and full setup of the 2nas flash tool from the below download links. The downloading links we have shared from its official and other servers. You will need to just download and install the latest 2nas flash tool setup on your PC then connect your mobile to your PC via the USB data cable which you want to flash. You will need to download the latest Stock ROMs/Firmware on your phone. Now you will get a 2nas flash tool from below downloading buttons.