So, you have an iPhone - great! But, have you ever wondered how this high-tech tool (or in some circles toy) actully works? How does it know where you are? Does the screen go off then you bring the phone to your ear during a telephone call - and if so, how do it know?

Well,  Jon Brandon from Computerworld.com explains all in this article.

It is a good read - I hope that you enjoy it And your iPhone.