Everywhere in Costa Rica you can find public phones. For a call you need a phone card. Two systems where available. Phone cards with a chip are easier to use, but most of phones work not with his system. For the second system you have to include a large number of digits written on the card. This cards you can use with all phones, also with private phones when you don´t want that the owner pay your call. Phone cards you can by in most supermarkets in values of 1000 , 2000 ,3000 or 10$ . A call will be between 50 Cents and 1 $ depends on the country. Calls within Costa Rica are cheap.