This post below was posted by CBK and it actually reminded us of a fake call we received last week.
We got the call through Viber application and the person said that he is from a popular Telecom company and when we asked him about the reason of calling through Viber, he had no reply and directly ended the call.
You should really be careful and don't believe any call or message that tells you that you won a prize.
They just want to take your personal banking information and Card PIN. .. Beware!