I've had a couple friends (thanks guys) send me this video with what appears to be an old lady using a cell phone in the background of a 1928 Charlie Chaplin film. Or as the poster suggests maybe it's a man in disguise (not that that would make a difference other than to address people's stereotypes of overweight old ladies not being time travelers).
Now there weren't cell satellites back then right? Unless the future went back and sent one up. Or maybe they have different technology in that old lady's time that doesn't require satellites and towers to use a cell phone. Who is she talking to? Another time traveler? Maybe it's come kind of communicator with the ship that is orbiting above? I don't know. What do you think?