Reverse Engineering iOS 18 Inactivity Reboot

Great post. They talked about the possibility of iOS 18 wirelessly telling other phones to reboot, but then afaik didn’t address that again. Maybe they did and I missed it?

They conclude that there's no wireless component to the feature.

This feature is not at all related to wireless activity. The law enforcement document's conclusion that the reboot is due to phones wirelessly communicating with each other is implausible. The older iPhones before iOS 18 likely rebooted due to another reason, such as a software bug.

If you think about it, if the attacker is sophisticated enough to break the phone within a 72 hour window, then they are definitely sophisticated enough to use a faraday container. So communication between phones wouldn't help very much.

Moreover, you'd have to have some inhibitory signal to prevent everybody's phones restarting in a crowded environment, but any such signal could be spoofed.