Initial iPhone buyers were ten times more likely than other new phone buyers to have previously owned a Treo, and three times more likely to have owned a T-Mobile branded phone (such as the Sidekick), according to a new report from The NPD Group. NPD surveyed more than 13,000 consumers to collect data for its iPhone Report, which aims to provide insight into how the iPhone is affecting mobile phone sales in the U.S. In contrast to the Treo and Sidekick,…
