Nielsen's statistics, which are based on a poll of 11,724 users, show BlackBerry's share dropped by 2 percent when compared to the previous qurater to 35 percent of the market, while iPhone consolidated its position in second place on 28 percent.
Smartphone penetration on the whole is also reported to be up, accounting for 23 percent of all mobile consumers in O1 2010 - up from 16 percent in Q2 2009.
Growing Google?
However, while Android also saw its share rise by 2 percent from the last quarter, iPhone's userbase is more than three times larger than Android in fourth place on 9 percent.
The soon-to-be-rebranded Windows Mobile is the third largest OS, with 19 percent.
Looking to be loyal
More interesting, however, is the loyalty both Apple and Google seem to have garnered from existing consumers.
When asked what their next handset would be, 80 percent of iPhone users said another iPhone, while 70 percent of those with Android handsets said they would be sticking with Google's OS.
Such figures compare favourably to both BlackBerry and Windows Mobile, with 47 percent of BlackBerry users looking to purchase another BlackBerry and 34 percent of Windows Mobile users intending to stay loyal to Microsoft.
Apple's march on RIM may be checked in the coming months, however. Nielsen stats suggests of those willing to switch handsets, there are more existing iPhone consumers willing to try Android than the other way round.
Although the rate at which Android users would like to try iPhone is actually twice as high as that of iPhone users who would try Android, iPhone's far superior market share means there are actually more iPhone users interested in Google's OS than vice versa.
Nielsen
