Let’s say Apple ships 7 million iPhones for the full year and that is 20% of the total market… iSuppli is forecasting that global handset shipments will be 1.3 billion units for 2008, so as a component of the overall market smartphones are pretty damn small.

It clearly shows a steady increase in iPhone sales from June 29, 2007 until January 14, 2008. It may not be the entire world’s favorite phone—it’s just barely gaining traction among business enterprise users—but as it already has 20 percent of smartphone sales after being on the market for less than a year, it’s certainly doing well.

[From The truth about the iPhone’s sales numbers]