Wireless Substitution: State-level Estimates From the National Health Interview Survey, January 2007–June 2010

The prevalence and use of wireless telephones (also known as cellular telephones, cell phones, or mobile phones) has changed substantially over the past decade. Today, an ever-increasing number of adults have chosen to use wireless telephones rather than landline telephones to make and receive calls. As of the first half of 2010, more than one in four American households (26.6%) had only wireless telephones— an eightfold increase over just 6 years (1). The prevalence of such ‘‘wireless-only...