Some phone cards charge a once off connection fee each you make a call. If make longer calls it may be better for you to buy a card that has a connection fee as the per minute rate is usually lower.

The billing increment is the smallest unit of time you are charged for. If a card has a 3 minute billing increment it means that you are charged for 3 minutes even if you make a one minute or two minute phone call. This is not as bad as it sounds as you will "lose" a maximum of 2 minutes or less on a 3 minute billing increment card regardless of how long you talk. Be careful of websites that sell cards that do not show the phone card's billing increment.

Some phone cards charge a once off connection fee each you make a call. If make longer calls it may be better for you to buy a card that has a connection fee as the per minute rate is usually lower.

The billing increment is the smallest unit of time you are charged for. If a card has a 3 minute billing increment it means that you are charged for 3 minutes even if you make a one minute or two minute phone call. This is not as bad as it sounds as you will "lose" a maximum of 2 minutes or less on a 3 minute billing increment card regardless of how long you talk. Be careful of websites that sell cards that do not show the phone card's billing increment.