People often underestimate the size of the mobile market and the number of people who carry internet connected mobile phones. 

Here are some numbers to give you an idea of the scope of the mobile phone market:

• iTunes App Store has over 1.5B downloads.
• There are approximately 28.5M active blackberries.
• There have been 21.4 million iPhones sold through March 2009.
• Nokia sold 18.4M Series 40 & Series 60 phones in 2Q 2009 alone.
• There were about 8 million windows mobile devices sold in 2Q 2009 by a variety of manufacturers.

These phones are used by their owners as more than phones - they are much more than that. They provide cameras, navigation tools, music, video, games, and many productivity tools. Their usefulness makes them a ubiquitous tool in the hands of their owners, and those owners are always trying to wring more out of them - because when a smartphone does something well, it instantly becomes the most portable and efficient tool for the job.