I was given this called to use for Viber, the person pretended to be someone else. After a lot of talking the person asked for money. Also sent fotos of the person he was pretending to be and messages.
same happened to me and 2 other people. I tried to contact the real person thru twitter, I hope he can expose the fake identity of this person and suit him/her. It's still going on, I am trying to keep the conversation going with the fake viber user so that perhaps someone finds a way to caught him/her.