I was wondering the same thing. Maybe it was on the lock screen? Seems unlikely that they managed to remember its association with the phone throughout, though.

I was wondering the same thing. Maybe it was on the lock screen? Seems unlikely that they managed to remember its association with the phone throughout, though. edit: we have the answer https://news.ycombinator.com/item?id=40579230 https://news.ycombinator.com/item?id=40579230