[Eagle Beach Boy]

Pre-paid cards are available at most shops. Others will recommend which phones to use and where they are located.

I myself and friends use SKYPE on the internet. If you have your own laptop you can use it in your room. Or use an internet shop's/hotel's computer and access your SKYPE account and use it.
Cost is about 18 cents a minute to connect with a telephone or free to connect with another computer.