Time Traveler, Charlie Chaplin

Do you believe time traveler?
This was a very famous video that everyone discussed for quite a long time...
It shows that the woman pass by the street with her hand up by her ear...
But what is she doing?
Can you make a guess?
Note that Charlie Chaplin was 1920's movie...
And handphone was invented in the late 1980's or early 1990's
And 1 more thing! The most earliest handphone is a big and bulky phone that you have to carry in your hand...

So, what do you think??