A length of time after which the card can no longer be used. Some cards are activated when purchased, others activate when you place your first call, and others carry a printed expiration date. Indicates companies that provide live operators around the clock, seven days per week. Customer service numbers are usually printed on the back of the cards. More calling time can be added to the card by telephone, using a credit card.
Some cards charge more for the first minute on international calls to certain countries.
In most cases, you must use a credit card. Available at most 7-Eleven stores nationwide. 24-hour customer service. Earns frequent flyer miles on American Airlines. 24-hour customer service.