Enterprises take note: Those in their prime workforce years -- ages 35-54 -- make up the largest percentage of iPhone users among all age groups.
This age group accounts for more than a third (36%) of the device's 6.4 million active users as of April 2009, according to The Nielsen Company.
The second-largest iPhone demographic (29%) is made up of those aged 25-34, while those aged 55 and over account for 17% of active users as of Q1 2009.
Nearly all (98%) use the data features on their iPhones, while 88% use the Internet, three quarters (75%) download applications, and 72% use location-based services. In fact, iPhone users are more likely than the typical mobile phone subscriber to take advantage of such features.
For example, they're four times as likely as the average user to access the Internet via their mobile device, five times as likely to download apps, and seven times as likely to use LBS features.
iPhone Audience Composition, Q1 2009
Source: The Nielsen Company, April 2009
| Age Range
| % Active Users
A November 2008 Nielsen report on the iPhone revealed that 13% of iPhone users have their employees footing the bill, compared with only 7% of average cellphone subscribers.
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