I am a businessman and I have to go to Canada for some business work for two months. But I can’t take my AT&T connection to Canada as it will cost me a lot. So I want to have an international calling card for Canada. I have searched on internet but I am not able to find good international calling cards. So I want to ask you, do you know about some different international calling cards? If yes then please tell me the cheapest and different international calling cards. If possible try to compare different international calling cards with respect to price and time limit. Thanks.