Rubicon Consulting surveyed 460 US iPhone users and found that, although they are generally "very satisfied" with the iPhone, a third of them carry a second phone. iPhone Matters reports that these folks use the iPhone for "media and e-mail functions" and use another handset for phone calls. The article posits, and we have to agree to some extent, that they might not even know that the iPhone is even a phone.

Half of the respondents got an iPhone to replace a standard cell phone, 40% were replacing a smartphone and 10% have an iPhone as their first cell phone, Rubicon found. E-mail and Web browsing are the most-used functions, and 75% said having an iPhone has encouraged them to spend more time browsing the mobile Web.