Recently, a video named "1938 movie Amazing Traveler" on Youtube, a video sharing website, has attracted strong attention. This video, shot more than 70 years ago, has been clicked and watched by netizens for more than 300,000 times, with countless comments. In the film, a young woman is talking to a small device similar to a mobile phone, and the background is said to be a factory of DuPont in the United States. What's going on here? The world's first mobile phone was born in 1973. It was not until the 1980s that people could buy large commercial mobile phones in the market, and the "slim version" mobile phone with the same size as the device she used did not appear until the 1990s.

Some people suspect that the video shooting time is fraudulent, but after a closer look, nothing unusual is found. The video is a black-and-white movie. In the picture, the lady is wearing a fashionable skirt in the 1930s, and passers-by beside her are also wearing contemporary clothes. The shooting time was confirmed as 1938.

Everyone guessed and guessed, and finally a user named "planetcheck" gave the "answer". He said that the lady in the video was her great-grandmother, Trude Jones, and she told herself the story she shot in the video when she was a child. In fact, the "mobile phone" in Ms. Jones's hand is the prototype of the pre-war wireless phone. Planetcheck quoted my grandmother as saying that she was only 17 years old at that time, and DuPont had set up a new telephone communication department and needed to do wireless telephone experiments. Jones and five other girls got a batch of wireless phones and had a week-long test, during which someone filmed them. In the video, she is talking to another researcher by wireless phone. When she came over, the researcher was walking towards her right.

So the so-called cross-talk doesn't exist.