[giantfrog]

Fun tip: If you have an iPhone, rapidly pressing the power button five times will force your phone to require a password before Face ID will work again. Turning your device off entirely will also necessitate password reentry.

[IncreasePosts]

Doesn't help if you're snagged and handcuffed before you can get to the power button!

[giantfrog]

Right, I'd recommend anyone worried about this to power off their laptop (assuming you've got full disk encryption turned on) and phone before going through security, customs, etc.

[m463]

for older phone it was power+down a few seconds.