Phone cards have become quite popular recently as people are realizing that they can save money by using domestic or international phone cards for their long distance calls. Long distance plan rates are often expensive and it is very easy to rack up large phone bills at the end of the month, especially if you call across the country or abroad regularly. Using international calling cards can help keep your spending in check. It's easy with phone cards. You cannot spend more money than what it cost to buy your phone card!