These charges often include access fees, weekly service fees, additional charges for calling from a pay phone and for calls made intrastate, or an activation fee when you first use the card. Avoid buying prepaid phone cards that make no disclosures. After you have read the fine print, do the math to figure the actual phone rates you may be charged. The actual costs are often significantly higher than the advertised rate. Since consumers may experience problems activating service or companies going out of business before you're the card expires, customer service telephone numbers displayed on the card may be of assistance.
Many cards expire one year after first use.
Be mindful of the expiration dates.