Preliminary results from the July–December 2012 National Health Interview Survey (NHIS) indicate that the number of American homes with only wireless telephones continues to grow. Nearly two in every five American homes (38.2%) had only wireless telephones (also known as cellular telephones, cell phones, or mobile phones) during the second half of 2012—an increase of 2.4 percentage points since the first half of 2012. [cont. – PDF]
Stephen J. Blumberg & Julian V. Luke, National Center for Health Statistics