During the second quarter of 2012 smartphone penetration continued to grow, with 54.9% of U.S. mobile subscribers owning smartphones as of June, reports the Nielsen research group (http://www.nielsen.com).

This growth is driven by increasing smartphone purchases. Two out of three Americans who acquired a new mobile phone in the last three months chose a smartphone instead of a feature phone.

According to Nielsen, Android continues to lead the smartphone market in the U.S., with a majority of smartphone owners (51.8%) using an Android OS handset. Over a third (34.3%) of smartphone owners use an Apple iPhone, and Blackberry owners represented another 8.1% of the smartphone market.

Overall among smartphone owners, Apple had the highest manufacturer share of smartphone handsets. Among recent acquirers who obtained their smartphone during June 2012, 54 percent said they chose an Android handset and 36 percent bought an iPhone.