[layer8]

1) Faraday cage.

2) If the thief knows or can guess your passcode, you are screwed, because they can take over your iCloud: https://www.macrumors.com/2023/04/19/apple-responds-to-iphon...

[neves]

In Brazil the thief menaces you till you give him your password

[jamespo]

they don't have many guesses to do that, how would they know the code given almost everyone unlocks via camera?

[layer8]

Read the link? Apple requires you to enter the passcode every now and then, and thieves exploit when that happens in public.