A friend of mine lived "long-distance" to me, phone wise. We'd split the phone bill we'd accrue when we'd dial each other's modem to play multiplayer. $0.10/min wasn't cheap to middle-schoolers, ha.
It’s fun to think about it now since 0% of the tricks still work but you could have called him for free fairly easily.
Ironically the tricks don't work anymore, but today you can call anywhere virtually for free.