Yes, Wal-Mart carries many different kinds of calling cards, including the one you will need to call your sister. Make sure you are getting the right card though.
International calling cards can be found at most major retailers, such as Target. They are normally found with other calling cards and pre-paid phone cards.
There are many websites that offer to sell calling cards. One would be able to find calling cards for sale on websites such as Best Buy, Radio Shack, or Pingo.
There are many websites that sell international calling cards online. One of the cheapest and most reliable is www.rebtel.com.
A calling card can be bought from online websites which sell them. You can buy them, they provide you with a code. The code can then be used to call internationally.
There are many great locations to buy international calling cards from. I would recommend a specialty store that specializes in foreign good/foods. I would recommend an African or Mexican food store. Some of them can be really small and hard to find but usually have a great selection of calling cards.
I would try looking at the corner stores which they really have great rates and prices on calling cards. I would try and buy calling cards that are in bundles you will be able to make more calls if you buy in bundles.
Yes, there are many places you can buy calling cards. Instead of buying one card with a lot of time on it, just buy several cards with less time on them. Here's a link to a bunch of calling cards on Amazon: http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=calling+card&x=0&y=0
free calling cards shop
There is not one specific store that sells the cheapest calling card as different stores carry different types of cards. One can visit EZCALLS, Phone Card Store or Speedy Pin to purchase calling cards.
There are many companies offering calling cards in bulk for less. One such site is http://www.zaptel.com/pages/bulk.html. Another good option is to check out Ebay.
Calling cards commonly are also referred to as phone cards. "Some calling card companies are switching to VoIP, so that term gets thrown in a lot when talking about calling cards."
Purchasing a phone calling card in the US can be done by visiting Wall-mart or Sams Club. Phone calling cards are always provided by a payphone provider like AT&T. In Europe, a phone calling card can be purchased by Nobelphonecards.