Both Vodafone and Airtel will be launching the iPhone on August 22 and experts expect Apple to sell slightly over 8,000 iPhones in the next one year.

It's estimated that RIM sells about 6,000 Blackberries every month.

In the enterprise space, the smartphone category is dominated by RIM, which is the de facto standard for C-Level executives. The other competitors include Nokia, HTC and Motorola. Apple may face a major cost hurdle if priced above the competitors' prices.

Image: Fair hostess Gabriele stands at the booth of mobile phone provider Vodafone and presents the BlackBerry Pearl 8110 (R) and a Vodafone Blackberry at the CeBIT 2008 trade fair in Hanover on March 3, 2008. | Photograph: David Hecker/AFP/Getty Images.