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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

About MobiLens

MobiLens data is derived from an intelligent online survey of a nationally representative sample of mobile subscribers age 13 and older. Data on mobile phone usage refers to a respondent’s primary mobile phone and does not include data related to a respondent’s secondary device.

About Comscore

Comscore, Inc. (NASDAQ: SCOR) is a global leader in digital measurement and analytics, delivering insights on web, mobile and TV consumer behavior that enable clients to maximize the value of their digital investments. For more information, please visit www.comscore.com/companyinfo.

Contact:

Adam Lella

Comscore, Inc.

+1 (312) 775-6474

press@comscore.com