Virtually all of the phone cards offered on Russia Call have a toll free access number, either in the United States and Canada, or in many countries overseas.  Having a toll free access number allows you to use the card from anywhere in a given country without paying for the call itself, thus you can easily use the card from a payphone, someone else's home or business, hotel, etc.  There might be, however, a surcharge for using toll free access number in case the phone card you use also offers a local access.  Most of the time the surcharge is very small; you still get a very low per minute rate.