Which country is the most expensive to make international phone calls from?

Question

Like to call the U.S. from another country or so, which countries would be the most expensive to call outside their own borders?

Answer 1

china

Answer 2

Antartica or Greenland I would presume - where it is hard to throw a cable or get a cellphone tower up - where Sat phones are used - maybe an oil rig or something.  

AM