iPhone: Made by Apple or Samsung?

Adds The Economist, which is the source of this graphic:

This puts Samsung in the somewhat unusual position of supplying a significant proportion of one of its main rival's products, since Samsung also makes smartphones and tablet computers of its own. Apple is one of Samsung's largest customers, and Samsung is one of Apple's biggest suppliers. This is actually part of Samsung's business model: acting as a supplier of components for others gives it the scale to produce its own products more cheaply. For its part, Apple is happy to let other firms handle component production and assembly, because that leaves it free to concentrate on its strengths: designing elegant, easy-to-use combinations of hardware, software and services.

It is complicated!