In the recent times many people get phone calls that says that they had won a prize from a draw from the popular mobilephone carrier. Already that they had sent the SMS messages to your mobile phone and you didn't respond to it. The caller may claim like that. For that reason he is calling your phone.
He may say that you had won a prize money of Rs 75,000/- from them.
Then he will ask for your name and address.
At this point you must ask them - "If they are calling from that comany they must have your name and address".
Normally when you ask them then the caller will stop the conversation.
If you provide them with your name and address then they will ask for some money to be deposited in the bank to get the price.
If you deposit the money, then you won't get any more calls from them.
Normally the phone number owner is a fake person.
Some crook communication personal, when take NIC photocopy may say that the copy is not clear and throw it. Later thay may sale the photocopy to these crooks. So when taking NIC photocopy be vigilant, you take only the copy and don't leave any copy over there.
Public holidays, Sundays and Poya days are the best time to make low priced calls to any part of the world from Sri Lanka through out the day and night.
International country code of Sri Lanka is +94 or 0094.