A Buyer's Guide to Prepaid Calling Cards UCAN Rates 10 of the most popular prepaid calling cards. Most cards do not display their International rates. Since these rates are complicated, UCAN has included the customer service number for each card next to the rating.
Some cards expire a few months after first use.
Some cards bill extra for the first minute, or charge in 2-minute increments. Ask before recharging. Some cards have no personal service at all, or limited customer service hours. Many retailers carry several brands of cards with different rates, and are misinformed as to the actual rate. Can be recharged by credit card.