The argument is that in
this footage from a featurette from a Charlie Chaplin film DVD, there is a woman time traveler talking on a cell phone.
There are a lot of arguments against it - she's shielding her face from the camera; her fingers are curled from arthritis; it's just a shadow; it's a publicity stunt for the guy's film company; etc - but it's fun to speculate and investigate.
What do you guys think?