Would the iPhone rule the world if Apple broke AT&T exclusivity?

The Apple iPhone took the smartphone world by storm 3 years ago, but seems to have hit a stagnant point as the device is only available on a single US wireless carrier. This exclusivity is seen in...

http://www.zdnet.com/blog/cell-phones/would-the-iphone-rule-the-world-if-apple-broke-at-t-exclusivity/3919