Interaction between people is biggest bliss in the world. That's the motive why the act of association was taken to better phases by engineering advances of the last hundred years. Even if your closest one is on the end of the world, you've got a chance to maintain contact with him/her. Your wants and technical resources define all that.
These days many of you can't picture their being without prepaid phone cards as it appeared to be so useful. E.g., Australia calling cards assist to elongate the important minutes of communication and save on international telephone calls.