You type your passcode on a crowded train, a bus, or at a restaurant table.
Someone nearby watches, then takes the phone.
With your passcode, they can change your Apple account password and lock you out of everything.
Apple added a feature to stop exactly this.
What does Stolen Device Protection do?
It adds extra checks when your iPhone is away from places it knows well.
At home or at work, your passcode works as usual.
Elsewhere, some sensitive actions need your Face ID or Touch ID, not just the passcode.
So a thief who only knows the passcode gets stuck.
What is the security delay?
For the most serious changes, there is also a wait.
Changing your Apple account password, for example, needs Face ID, then an hour's wait, then Face ID again.
That hour gives you time to mark the phone as lost from another device.
Do I need to turn it on?
Yes, and before anything happens.
It needs iOS 17.3 or later and Find My switched on.
Open Settings -> Face ID & Passcode, enter your passcode, then tap Stolen Device Protection and turn it on.
On older iPhones the menu is called Touch ID & Passcode.
What about the option called Always?
Inside the same screen you can require the security delay everywhere, not only away from familiar places.
It is a little less convenient.
It is worth it if you travel a lot, or if your "familiar places" include busy offices.
Will it get in my way?
Rarely.
Everyday use, paying with Apple Pay and opening apps is unchanged.
You will notice it only when you change something important while out.
That is exactly the moment it is supposed to slow things down.
What else helps?
Use a six-digit passcode, not four.
Shield the screen when you type it in public.
Use Face ID wherever you can, so you type the passcode less often.
Things to Remember
- Turn it on in
Settings -> Face ID & Passcode -> Stolen Device Protection. - It needs iOS 17.3 or later and Find My switched on.
- Away from familiar places, sensitive changes need Face ID and sometimes an hour's wait.
- Choose Always if you are often out and about.
- Cover your passcode when you type it in public.