What phones do the bigwigs in the communications industry use?

In the guest interviews at the 2007 China International Telecommunications Expo, a special note was made to ask each guest one particular question: what kind of mobile phone do they use and why? In response to this question, the guests spoke at length. These experts and presidents, who are usually high up in their respective fields, what kind of mobile phones do they actually use? And what are some of their unique perspectives when it comes to choosing a mobile phone?