Ok, so you want to buy a smartphone. Great choice. Modern smartphones gives you robust email integration, great organization capabilities (notes, calendars et all), great internet browsing experience, and above all, great extensibility through applications. They are mini personal computers that you can carry around in your pocket.
Now, the next question is, which one ? The engine behind a smartphone is its Operating System (OS). This presents you with 5 great choices, each with its own pros and cons.
First lets see a few charts to set the context:
Symbian is the most popular operating system with about 40% share in all handsets sold (as of Q2, 2010). RIM (BlackBerry), Android and iPhone OS follow behind with about 20% share each.
See full article at Phonecurry blog.