Was this really the world's first cell phone? Mystery of 1938 film that shows woman talking on wireless device may finally be solved

The mystery surrounding the video from 1938- showing a young woman using device that resembles modern day cell phone- seems to have been solved.

In the video, a women is seen talking on a wireless handset device that has an uncanny resemblance to present day mobile phones. The video was shot in 1930s in a factory in the United States.

The video came to light last year and ignited a huge debate about the authenticity of the footage. Some called it an instance of time travelling while others called it modern technology existing way before its time.

One year later, after the video first came to light, a man has come forward with an answer.

According to him, the woman in the picture is his great grandmother. 

The user says that the woman really is using a cell - but it's a pre-war prototype developed by a communications factory, owned by US industrial giant Dupont, in Leominster, Massachusetts, according to news report in Daily Mail.

The video was re-loaded by an account called 'planetcheck'. The YouTube user says that the woman is his great grandmother.

'She was 17 years old. I asked her about this video and she remembers it quite clearly. She says Dupont had a telephone communications section in the factory.'

'They were experimenting with wireless telephones. Gertrude and five other women were given these wireless phones to test out for a week.'

'Gertrude is talking to one of the scientists holding another wireless phone who is off to her right as she walks by.'

This is not the first instance when videos- indicating that cell phones existed way before the time they were invented- have surfaced. In 1928, a Charlie Chaplin movie also appears to show a woman using a mobile phone - causing speculation that she was a time traveler, the news report said.