That is effectively impossible though. There's data centers of stripped down phones, so "it's actually a phone" doesn't do it.
That is effectively impossible though. There's data centers of stripped down phones, so "it's actually a phone" doesn't do it.
There's some work on using phone accelerometer data as a "proof of human," e.g. "move your phone in a figure eight," which I guess machines can't quite do in a human enough way yet.