Covering the 3-month period between April and July 2012, there were more than 114 million smartphone owners in the U.S. -- a 7 percent increase from April.
More specifically, Google's Android platform continues to lead with more than half of the platform market share at 52.2 percent, but Apple's 2 percentage point increase tipped the scales so that it now accounts for approximately one in three subscribers domestically.
Those two giants were trailed by RIM, Microsoft and Symbian -- all three of which saw their smartphone market share percentages decrease.
On the mobile OEM front, Samsung continued to lead despite a negative 0.3 point change. Nevertheless, the Korean electronics giant continued to retain 25.6 percent of the market share from the June 2012 report.
Interestingly, the only two mobile OEM makers to see gains in July were Apple in third place and HTC in fifth place. However, the August report could be very different based on earlier news on Tuesday regarding the Galaxy S3.
For reference, comScore surveyed more than 30,000 U.S. mobile subscribers for this report. Approximately 234 million Americans age 13 and older were accounted to have used mobile devices by the end of July.