What is the best international calling cards from Europe to the US?

I live in the U.S. Do I need to be looking for an international calling card or something like that? I really don’t know what I should be looking for. Help?

ok well my girlfriend went to europe for the summer i live in the us and she got a prepaid calling card. When she calls me on my cellphone do i get charged extra in any way because its long distance? or is it like using regular minutes?

im new in chicago and im getting a prepaid tmobile plan i wanted to know if my minutes get used if i used a calling card to call international

what is the cheapest international calling card to call From New York to China, and how much the cost?