The Android exited the third quarter with 19% smartphone market share, with the BlackBerry OS and Apple iOS grabbing 30% and 28%, respectively, according to the Nielsen research group — as reported by “eWeek” (http://www.eweek.com/c/a/Mobile-and-Wireless/Android-at-at-19-as-Apple-Closes-on-RIM-Nielsen-195231/).

The BlackBerry OS, which just months ago commanded more than 40% of the U.S. smartphone market before the rivalry between iPhone and Android took wing, dipped to 30% market share, per the study. The iPhone 4 has been the hottest-selling smartphone, says Nielsen.