Everyone knows the problem that someone gave you his calling card, but by the time you use it, the phone number is outdated. The Self-Updating Calling Card has a battery and a tiny receiver. Once in a while it will connect to the Self-Updating Calling Card Center that has issued the card. If there's new data, it will automatically replace the old information and show it on the card. Thus your contacts will stay up-to-date forever. If you want to break with your old acquaintances, no...