You must try these calling cards as they initially give 15 FREE minutes to new customers.
If you make very frequent international calls these cards are good choice as most of them do not have connection fee.
Most of the calling cards are comparatively very cheap.
Call quality is good. They give you rating for each calling card so that you can decide which is better card for you.
Pin-less Dialing for almost all the cards.
They have secure Payments options to buy online and response is very fast.
You can opt for autorefill when balance is low. Or recharge at your will.
Option for Toll free, Pay Phone and Local Access is available.