Android-based phones outsold the iPhone in the U.S. for the first time last quarter according to a report from Market Research firm NPD.

Google’s Android-based smartphones accounted for 28% of smartphone sales, while the iPhone accounted for 21%. Research In Motion’s Blackberry outsold both with 36% of the sales.

According to All Things D, NPD’s numbers come from self-reported online consumer surveys where corporate sales aren’t included, so there’s likely some variance between their results and actual sales data.

Who is the NPD you may ask? An established and well respected firm with a history of reasonably accurate estimations of retail sales.