The home screen looked normal. Same icons, same wallpaper of his dead dog, Gus. But the app had a new entry at the top, just above his Apple ID: "Internal."
There is no widely available, stable "custom ROM" for iOS equivalent to Android. Most "modified" firmware files are simply official IPSW files modified ios firmware iphone 11 patched
The iPhone 11 was a turning point in hardware security. Unlike the iPhone X and older models, which had a permanent hardware vulnerability called checkm8 , the iPhone 11 is immune to that specific exploit. The home screen looked normal