My parents recently returned from an extended vacation with their new cell phone. Although they are on a nationwide plan, they did make a brief foray into Canada, so they were hit with some surprise "roaming charges."

Even though they've been back for awhile, those charges didn't appear on their statement for several months. I had to explain to them that such things take time to work through the system.

Specifically, I told them, "Roamin' wasn't billed in a day."