Someone lost their phone in the parking lot outside my building earlier. Not really having experience with this sort of matter, I tried fumbling around with ways of getting in contact with the owner before she eventually called her phone and I confirmed that it was safe and sound and arranged a handover.
I had a somewhat related experience, but different end of the stick.
I did some late-night shopping at the supermarket and was coming home while playing a game on my phone, some lanky dude started following me for a bit, and shined a flashlight in my face and on my phone and kept looking at my phone. I should not it was pitch dark, and my eyes weren't dark-adjused due to looking at a bright screen. These were the backstreets between the supermarket and my house however so I was familiar with the route. Kinda freaked me out, so I just kept walking hoping nothing weird was going to happen.
A little later that dude came right up behind me, still with the flashlight glaring and said "hey you" or something similar. I was thinking "oh god what the fuck, I have to deal with some random asshole when I'm just trying to go home" right then.
Then he said "have you seen an iPhone6?", and because of the suddenness I could just manage a bark of "un, no I haven't" or similar. Though after that the incident started to make sense. He's looking for a phone, someone is walking along and that person "just happens" to be looking at a phone: "maybe they've got my phone!", which makes sense until you realize just about every fucking person these days walks around looking at their phone a lot of the time.
Although I have a feeling the guy isn't very socially adept. Have I seen a phone lying around, in the middle of night, in a pitch dark back street, while I'm walking along staring at a brightly-lit screen? And to top that off, the expectation that I'd notice this small block of plastic lying on the ground and be able to note the make and model. A more sensible approach, once he'd realize my cheap Android phone is definitely not any sort of "iPhone" (like that would even be a clue) would be a polite, "excuse me" followed by a "I've lost my phone, it's an iPhone 6, you haven't seen anything like that have you?". Because if he was at least polite I might have offered to try calling the phone rather than running away.