Firmware Flash Tool Link — Iphone

Since you did not specify which specific tool you are looking for (there are several major ones), I have provided the official or verified download sources for the three most reputable tools in the industry, followed by a solid review of each.

These are the most secure methods and ensure you are using verified firmware directly from Apple. iphone firmware flash tool link

Network firewall blocking Apple’s gs.apple.com. Fix: Temporarily disable antivirus and VPN. Ensure ports 80, 443, and 5223 are open. Since you did not specify which specific tool

You cannot simply "download" the firmware from the iPhone settings. You must download the raw file from Apple's servers. iphone firmware flash tool link