One more note so we can exhaust the cell phone topic-

Let's say you have a Telefónica calling card to use on pay phones-
If you happen to be using it within Spain to call others on their cell phones, the time runs out really fast, since it's MUCH more expensive to call a cell phone than to call a regular phone. I guess the calling cards are handy, but they run out really fast. Still, it's more convenient that plugging the phone w/ coins.