cheapest international calling card

After trying out all sorts of calling cards, reliance, airtel, tata international calling facilities and others, I've finally found a great option for international calling. Though its original rates, are good enough in itself; what makes it best and cheapest, is when you know some referral code. If you join it, using the referral code, you get double the value of your recharge. I finally manage to call India with less than 3 cents per minute :)...Man; that's less than the local call rate, I used to pay in India. If you wanna try it out, visit stanacard.com and join using this referral code: 303485 or simply join from here http://www.stanacard.com/?ref=303485 ...enjoy, the easy to dial, pinless and still the most secure option and local number like dialling (not the big numbers as in many others).