That's probably the best time to steal it: the device is unlocked, giving access to the data and settings etc. Also the owner is distracted looking at the scree

That's probably the best time to steal it: the device is unlocked, giving access to the data and settings etc. Also the owner is distracted looking at the screen, and it's held in a position conducive to snatching. In short I'd expect this to be the main mode of phone theft directly from the owner.