Tell, who knows about calling cards.

Greetings!
Somewhere read, that there are calling cards for the international calls.
The low price.

I want to call the friend.
If I shall call from usual phone to Benin that should be spent many money.
Tell, who knows about cards.
How to get?

When you make a call, the total price of the call which is frequently made up of several elements is accumulated and the remaining value on the calling card is reduced by the cost of the telephone call.

try to do Google search. you will find many options.