iPhone M68 Prototype Board
Apple developed the iPhone in extreme secrecy. Security was so tight that engineers working on the device were kept in the dark on what they were developing. To keep things under wraps, Apple created iPhone M68 development motherboards that look like a circuit board you’d find on a computer. One such board made its way into the hands of an anonymous source who gave The Verge a closeup look at the board. The board contains all the critical components of an iPhone, including a jack that allows engineers to test out the calling features.