Almost everyone in the world knows what a SIM is. It’s the little piece of plastic with gold bits on it that makes your mobile phone work.
Almost nobody in the world knows how a SIM works.
That’s about to change, as over the next few years we’re going to see SIMs disappear. Or at least the bits of plastic with gold bits on will disappear, as the things that a SIM does get integrated inside your phone. It brings the prospect of changing the way phone contracts work, allowing your phone to do far more, and has the potential to disrupt the current business models of network operators.