While Apple's tools download these automatically, you can find specific versions at IPSW.me . 2. How to Flash Your Firmware
Elias hit download. The file was tiny—less than five megabytes. He ran the executable through the terminal. Instead of a flashy UI, the screen went black, then filled with a scrolling waterfall of green kernel logs. The iPhone’s screen flickered, the red 'low battery' symbol replaced by a purple data-transfer glyph Elias had never seen before. iphone firmware flash tool link
, depending on your computer's operating system. To perform a "flash" (restore), you typically need the device in Recovery Mode Apple Support Official Firmware Flash Tools While Apple's tools download these automatically, you can