International calls can be made from private cell phones, public IDD phones, or hotel IDD phones. International calls are charged in units of six seconds. It is best to have a phone card when making these calls to prevent a shocking bill in the future. Teachers have a habit of "drunk dialing" in fact, that seemed to be the only time I called home when I was abroad. My folks thought I had a bit of a problem but it was just that I got a little over emotional after the 12th bottle of beer. After the first phone bill I ALWAYS used phone cards or better yet Skype.