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Comscore Reports November 2010 U.S. Mobile Subscriber Market Share

Google Android Reaches #2 Spot among Smartphone Platforms

RESTON, VA, January 6, 2011 – 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. mobile phone industry during the three month average period ending November 2010. The report ranked the leading mobile original equipment manufacturers (OEMs) and smartphone operating system (OS) platforms in the U.S. according to their share of current mobile subscribers ages 13 and older, and reviewed the most popular activities and content accessed via the subscriber’s primary mobile phone. The November report found Samsung to be the top handset manufacturer overall with 24.5 percent market share, while RIM led among smartphone platforms with 33.5 percent market share.

OEM Market Share

For the three month average period ending in November, 234 million Americans ages 13 and older used mobile devices. Device manufacturer Samsung ranked as the top OEM with 24.5 percent of U.S. mobile subscribers, up 0.9 percentage points from the three month period ending in August. LG ranked second with 20.9 percent share, followed by Motorola (17.0 percent), RIM (8.8 percent) and Nokia (7.2 percent).

Top Mobile OEMs

3 Month Avg. Ending Nov. 2010 vs. 3 Month Avg. Ending Aug. 2010

Total U.S. Mobile Subscribers Ages 13+

Source: Comscore MobiLens Share (%) of Mobile Subscribers Aug-10 Nov-10 Point Change Total Mobile Subscribers 100.0% 100.0% N/A Samsung 23.6% 24.5% 0.9 LG 21.2% 20.9% -0.3 Motorola 18.8% 17.0% -1.8 RIM 9.0% 8.8% -0.2 Nokia 7.6% 7.2% -0.4

Smartphone Platform Market Share

61.5 million people in the U.S. owned smartphones during the three months ending in November, up 10 percent from the preceding three-month period, as RIM led with 33.5 percent market share of smartphones. After several months of strong growth, Google Android captured the #2 ranking among smartphone platforms in November with 26.0 percent of U.S. smartphone subscribers. Apple accounted for 25.0 percent of smartphone subscribers (up 0.8 percentage points), followed by Microsoft with 9.0 percent and Palm with 3.9 percent.

Top Smartphone Platforms

3 Month Avg. Ending Nov. 2010 vs. 3 Month Avg. Ending Aug. 2010

Total U.S. Smartphone Subscribers Ages 13+

Source: Comscore MobiLens Share (%) of Smartphone Subscribers Aug-10 Nov-10 Point Change Total Smartphone Subscribers 100.0% 100.0% N/A RIM 37.6% 33.5% -4.1 Google 19.6% 26.0% 6.4 Apple 24.2% 25.0% 0.8 Microsoft 10.8% 9.0% -1.8 Palm 4.6% 3.9% -0.7

Mobile Content Usage

In November, 67.1 percent of U.S. mobile subscribers used text messaging on their mobile device, up 0.5 percentage points versus the prior three month period, while browsers were used by 35.3 percent of U.S. mobile subscribers (up 0.8 percentage points). Subscribers who used downloaded applications comprised 33.4 percent of the mobile audience, representing an increase of 1.1 percentage points. Accessing of social networking sites or blogs increased 1.0 percentage points, representing 23.5 percent of mobile subscribers. Playing games attracted 22.6 percent of the mobile audience while listening to music attracted 15.0 percent.

Mobile Content Usage

3 Month Avg. Ending Nov. 2010 vs. 3 Month Avg. Ending Aug. 2010

Total U.S. Mobile Subscribers Ages 13+

Source: Comscore MobiLens Share (%) of Mobile Subscribers Aug-10 Nov-10 Point Change Total Mobile Subscribers 100.0% 100.0% N/A Sent text message to another phone 66.6% 67.1% 0.5 Used browser 34.5% 35.3% 0.8 Used downloaded apps 32.3% 33.4% 1.1 Accessed social networking site or blog 22.5% 23.5% 1.0 Played Games 23.0% 22.6% -0.4 Listened to music on mobile phone 14.7% 15.0% 0.3

About Comscore

Comscore, Inc. (NASDAQ: SCOR) is a global leader in measuring the digital world and preferred source of digital business analytics. For more information, please visit www.comscore.com/companyinfo.

Contact:

Adam Lella

Comscore, Inc.

+1 (312) 775-6474

press@comscore.com