One in eight US households have no fixed-line phone and rely solely on mobile voice services, according to a US federal study. The study claims that growth in mobile-only households is decelerating. 14% of American homes had mobiles, but no fixed-line connection in the first half of 2007, which represents growth of 1% over the previous six months, whereas, in the second half of 2006, the number of such households grew 2%. The people most likely to be living in mobile-only homes are young, poor, male or Hispanic Americans. Three out of 10 Americans aged between 18 and 30 have mobile-only connections, compared with 18% of Hispanic people. 59% of all US households have both mobile and fixed-line connections, while just 24% of homes only have landlines.