Companies tried other business models, such as charging customers for access, but very few succeeded in getting people to pay up.

ECONOMIST: Internet companies: The end of the free lunch��again | The

It was bad enough when flash memory overtook hard drives in little devices: Apple's classic iPod used a tiny hard drive memory, but the other models rely on flash memory.

FORBES: Magazine Article

Samsung can afford to mess up several of its models, as other successful products in their portfolio will make up for losses, but what would be the impact of two generations of poor iPhones in a row on Apple?

FORBES: Update: Added a new perspective