Android the Only Smartphone OS Gaining Market Share?

In the U.S. market, at least, Android devices seem to be the only class of devices, sorted by operating system, that has gained market share over the last six months, Nielsen reports.

Android. iPhone, BlackBerry: Growth is Not the Same As Installed Base

NPD Group has found Research in Motion remains the smartphone leader, at 36 percent market share for the second quarter of 3010. Android devices had 28 percent share of quarterly sales, and the iPhone OS was third at 21 percent.

Quarterly share reports, though, do not describe the installed base, equally important. Looked at that way, RIM, the iPhone and even Windows Mobile and Palm had higher installed base percentages in December 2009, for example.

http://www.npd.com/press/releases/press_100804.html