Stop us if you’ve heard this one before: Android and iOS continued to expand their market shares in the United States at the expense of Windows Phone and BlackBerry. The latest numbers from comScore show that Android devices accounted for 52.4% of all U.S. smartphone subscriptions in the spring quarter this year, up from 51.7% in the previous quarter. Apple’s ever-popular iPhone also saw its U.S. market share expand to 39.2% in the spring, up from 38.9% in the previous quarter.

ComScore’s numbers weren’t so rosy for BlackBerry and Windows Phone, however. In BlackBerry’s case, the company saw its market share drop from 5.4% to 4.8% on the quarter while Windows Phone’s market share dropped from 3.2% to just 3%. In other words, it seems that both Microsoft and BlackBerry are currently losing the battle to establish themselves as major players in the U.S. mobile market.

In terms of individual vendors, comScore found that Apple accounted for 39.2% of subscribers, followed by Samsung at 23% and HTC at 8.7%. HTC shouldn’t feel too comfortable with its third-place finish, however, since its market share dropped by 0.6 percentage points on the quarter while both Apple and Samsung continued to expand.

ComScore’s full press release follows below.

comScore Reports May 2013 U.S. Smartphone Subscriber Market Share Smartphone Audience Surpasses 140 Million in May RESTON, VA, June 28, 2013 – comScore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world, today released data from the comScore MobiLens service, reporting key trends in the U.S. smartphone industry during the three month average period ending May 2013. Apple ranked as the top smartphone manufacturer with 39 percent OEM market share, while Google Android led as the #1 smartphone platform with 52 percent platform market share. Smartphone OEM Market Share 141 million people in the U.S. owned smartphones (59 percent mobile market penetration) during the three months ending in May, up 6 percent since February. Apple ranked as the top OEM with 39.2 percent of U.S. smartphone subscribers (up 0.3 percentage points from February). Samsung ranked second with 23 percent market share (up 1.7 percentage points), followed by HTC with 8.7 percent, Motorola with 7.8 percent and LG with 6.7 percent. Top Smartphone OEMs

3 Month Avg. Ending May 2013 vs. 3 Month Avg. Ending Feb. 2013

Total U.S. Smartphone Subscribers Age 13+

Source: comScore MobiLens Share (%) of Smartphone Subscribers Feb-13 May-13 Point Change Total Smartphone Subscribers 100.0% 100.0% N/A Apple 38.9% 39.2% 0.3 Samsung 21.3% 23.0% 1.7 HTC 9.3% 8.7% -0.6 Motorola 8.4% 7.8% -0.6 LG 6.8% 6.7% -0.1 Smartphone Platform Market Share Android ranked as the top smartphone platform in May with 52.4 percent market share (up 0.7 percentage points from February). Apple ranked second with 39.2 percent market share (up 0.3 percentage points), followed by BlackBerry with 4.8 percent, Microsoft with 3 percent and Symbian with 0.4 percent. Top Smartphone Platforms

3 Month Avg. Ending May 2013 vs. 3 Month Avg. Ending Feb. 2013

Total U.S. Smartphone Subscribers Age 13+

Source: comScore MobiLens Share (%) of Smartphone Subscribers Feb-13 May-13 Point Change Total Smartphone Subscribers 100.0% 100.0% N/A Android 51.7% 52.4% 0.7 Apple 38.9% 39.2% 0.3 BlackBerry 5.4% 4.8% -0.6 Microsoft 3.2% 3.0% -0.2 Symbian 0.5% 0.4% -0.1