It's widely considered one of the most valuable brands in the planet, with its fans practically selling their first born to obtain the latest must-have product. However, as with all multinational brands, it's worth investigating just how the workers who are putting this highly desirable gadgetry together are really treated. Tonight, Panorama goes undercover in China to show what life is like for the workers making the iPhone 6, while reporter Richard Bilton travels to Indonesia to find children working in some of the most dangerous mines in the world.