Local calls 10p. You can have international call or collect calls from most of the pay phones. But if you call overseas, you buy private company phone cards. They all use pin code system and call back system. So you have to dial a lot of numbers but the cost is incredibly cheap, Many difference companies offering the service so make sure the rate before you buy a card.
Cards are available from kiosk or phone cards shops.
There are three international airports. 1 hr from the center. Information and free hostel reservation are available. From Victoria station. There are two bus stations.