If you want a raw to download the IPSW file directly (to flash later via iTunes’ Shift+Restore method), you need a trusted repository. Never download IPSW from random forums or torrents.
Please note that you should only provide the link to the official website or a trusted source to ensure the safety and security of the user's device. iphone firmware flash tool link
Ensure your laptop is plugged in or your desktop is on a stable power source. If the computer shuts down during a flash, it can "brick" the phone. If you want a raw to download the