A survey of over 8,000 American adults found that almost half of those aged 18-34 own smartphones, compared to less than 10% of those aged 55 and older. About one third of respondents expressed privacy concerns about personal information stored on smartphones. All age groups were equally concerned about identity theft if a smartphone was stolen, while younger adults worried more about damage to their social lives through compromised social media accounts. The survey also examined whether security issues influence people's decisions not to own a smartphone.