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Comscore Reports October 2011 U.S. Mobile Subscriber Market Share

1 in 10 Mobile Subscribers Now Using iPhone

RESTON, VA, December 2, 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 October 2011. The study surveyed more than 30,000 U.S. mobile subscribers and found Samsung to be the top handset manufacturer overall with 25.5 percent market share. Google Android continued to gain ground in the smartphone market reaching 46.3 percent market share.

OEM Market Share

For the three-month average period ending in October, 234 million Americans age 13 and older used mobile devices. Device manufacturer Samsung ranked as the top OEM with 25.5 percent of U.S. mobile subscribers, followed by LG with 20.6 percent share and Motorola with 13.6 percent share. Apple strengthened its position at #4 with 10.8 percent share of mobile subscribers (up 1.3 percentage points), while RIM rounded out the top five with 6.6 percent share.

Top Mobile OEMs

3 Month Avg. Ending Oct. 2011 vs. 3 Month Avg. Ending Jul. 2011

Total U.S. Mobile Subscribers (Smartphone & Non-Smartphone) Ages 13+

Source: Comscore MobiLens Share (%) of Mobile Subscribers Jul-11 Oct-11 Point Change Total Mobile Subscribers 100.0% 100.0% N/A Samsung 25.5% 25.5% 0.0 LG 20.9% 20.6% -0.3 Motorola 14.1% 13.6% -0.5 Apple 9.5% 10.8% 1.3 RIM 7.6% 6.6% -1.0

Smartphone Platform Market Share

90 million people in the U.S. owned smartphones during the three months ending in October, up 10 percent from the preceding three month period. Google Android ranked as the top smartphone platform with 46.3 percent market share, up 4.4 percentage points from the prior three-month period. Apple maintained its #2 position, growing 1.0 percentage point to 28.1 percent of the smartphone market. RIM ranked third with 17.2 percent share, followed by Microsoft (5.4 percent) and Symbian (1.6 percent).

Top Smartphone Platforms

3 Month Avg. Ending Oct. 2011 vs. 3 Month Avg. Ending Jul. 2011

Total U.S. Smartphone Subscribers Ages 13+

Source: Comscore MobiLens Share (%) of Smartphone Subscribers Jul-11 Oct-11 Point Change Total Smartphone Subscribers 100.0% 100.0% N/A Google 41.9% 46.3% 4.4 Apple 27.1% 28.1% 1.0 RIM 21.7% 17.2% -4.5 Microsoft 5.7% 5.4% -0.3 Symbian 1.9% 1.6% -0.3

Mobile Content Usage

In October, 71.8 percent of U.S. mobile subscribers used text messaging on their mobile device, up 1.8 percentage points. Browsers were used by 44.0 percent of subscribers (up 2.9 percentage points), while downloaded applications were used by 43.8 percent (up 3.2 percentage points). Accessing of social networking sites or blogs increased 2.2 percentage points to 32.3 percent of mobile subscribers. Game-playing was done by 29.2 percent of the mobile audience (up 1.4 percentage points), while 21.2 percent listened to music on their phones (up 0.9 percentage points).

Mobile Content Usage

3 Month Avg. Ending Oct. 2011 vs. 3 Month Avg. Ending Jul. 2011

Total U.S. Mobile Subscribers (Smartphone & Non-Smartphone) Ages 13+

Source: Comscore MobiLens Share (%) of Mobile Subscribers Jul-11 Oct-11 Point Change Total Mobile Subscribers 100.0% 100.0% N/A Sent text message to another phone 70.0% 71.8% 1.8 Used browser 41.1% 44.0% 2.9 Used downloaded apps 40.6% 43.8% 3.2 Accessed social networking site or blog 30.1% 32.3% 2.2 Played Games 27.8% 29.2% 1.4 Listened to music on mobile phone 20.3% 21.2% 0.9

About MobiLens

MobiLens data is derived from an intelligent online survey of a nationally representative sample of mobile subscribers age 13 and above. 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 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