What would happen if someone from the year 2015 shows up in the streets in the year 1940?

Talking on their iPhone and getting out of their 2016 brand new car and wearing clothes from this era. You think he/she would get stopped / detained and possibly killed.

Die of starvation & loneliness…

I'd wonder how the hell did the guy from 2014 even get signal on his phone. Knowing there were no cell phone towers back in 1940…

A person from 2015 ended up in 1940 with a 2016 car… Welp, I should say they'd be given some pretty weird looks, truth be told. People would probably think it was fancy dress or something - I doubt they'd be locked up unless they were dangerous.

I think I would be on another episode of Quantum Leap…