Buying a new shiny new electronic device doesn’t necessarily just mean shelling out for the device itself. It also might mean buying — or perhaps even re-buying — new accessories, software or added services. For example, customers who bought the first iPhone and upgraded to the iPhone 3G lost out in several ways. In addition to the cost of the iPhones, their cases usually didn’t fit the more rounded iPhone 3G. Soft silicon skins sort of fit, while most hard cases would not and some old cases caused screwy behavior with the changes to the ambient light sensor on the new iPhone 3G.