Reverse Engineering iOS 18 Inactivity Reboot

To me the biggest takeaway is that Apple is sufficiently paranoid to add this feature. Some people (like John Gruber) advocate for activating bio lockout at the border by squeezing the volume and power buttons. I would say if you’re the type of person who would do this, you should go one step further and power off.

Similarly, if you’re in a situation where you cannot guarantee your phone’s security because it’s leaving your possession, and you’re sufficiently worried, again, power off fully.

What do you do if you’re at the border and they demand both the physical device and the password?

Let’s assume “get back on the plane and leave” is not a viable option.

That’s a significantly higher bar. It’s not foolproof though.

I believe in most countries, customs can inspect your luggage. They can’t force you to reveal information that they’re not even certain you have.

Under your situation, the best idea is to simply have a wiped device. A Chromebook, for example, allows you to login with whatever credentials you choose, including a near empty profile