ATLANTA -- Californians are continuing their long-standing love affair with old-school phone companies.
According to a federal study released Wednesday, only one California household in 10 is wireless-only.
Oklahoma and Utah are the mobile trendsetters, with at least one in four households substituting cell phones for landlines.
Vermont came in last with only 5.1 percent of households going exclusively mobile.
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"These findings are important to CDC because many of our largest surveys are done on calls to landline phone numbers. All of those adults with only cell phones are being missed in these surveys," lead author of the study, Stephen J. Blumberg, told Reuters.
The study, entitled Wireless Substitution: State-level Estimates From the National Health Interview Survey, January–December 2007, was conducted by the Centers for Disease Control and Prevention.