RESTON, VA, February 8, 2010 – 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 over the three month period between September and December 2009. 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 age 13 and older, as well as the most popular forms of content and activity accessed via mobile device. The report found Motorola to be the top handset manufacturer with 23.5 percent market share, while RIM led among smartphone platforms with 41.6 percent market share.

OEM Market Share

A total of 234 million people age 13 and older in the U.S. used mobile devices in December 2009. Device manufacturer Motorola was the top ranked OEM with 23.5 percent of U.S. mobile devices. LG ranked second with 21.9 percent share, followed by Samsung (21.2 percent share), Nokia (9.2 percent share) and RIM (7.0 percent share).

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Top Mobile OEMs

3 Months Ending Dec. 2009 vs. 3 Months Ending Sep. 2009*

Total U.S. Age 13+

Source: comScore MobiLens

Share (%) of Mobile Devices

Sep-09 Dec-09 Point Change

Total Mobile Subscribers 100.0% 100.0% N/A

Motorola 24.9% 23.5% -1.4

LG 21.7% 21.9% 0.2

Samsung 20.4% 21.2% 0.8

Nokia 9.6% 9.2% -0.4

RIM 6.4% 7.0% 0.6

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Smartphone Platform Market Share

RIM was the leading mobile smartphone operating system in the U.S. in December 2009 with 41.6 percent share of U.S. smartphone devices. Apple ranked second with 25.3 percent share (up 1.2 percentage points), followed by Microsoft with 18.0 percent share, Palm with 6.1 percent share, and Google with 5.2 percent share (up 2.7 percentage points).

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Top Smartphone Platforms

3 Months Ending Dec. 2009 vs. 3 Months Ending Sep. 2009

Total U.S. Age 13+

Source: comScore MobiLens

Share (%) of Smartphone Devices

Sep-09 Dec-09 Point Change

Total Smartphone Subscribers 100.0% 100.0% N/A

RIM 42.6% 41.6% -1.0

Apple 24.1% 25.3% 1.2

Microsoft 19.0% 18.0% -1.0

Palm 8.3% 6.1% -2.2

Google 2.5% 5.2% 2.7

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Mobile Content Usage

In December 2009, 63.1 percent of U.S. mobile subscribers used text messaging on their mobile device, up 2.1 percentage points from three months prior. Browsers were used by 27.5 percent of U.S. mobile subscribers (up 1.5 percentage points), while subscribers who played games made up 21.6 percent (up 0.2 percentage points).

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Mobile Content Usage

3 Months Ending Dec. 2009 vs. 3 Months Ending Sep. 2009

Total U.S. Age 13+

Source: comScore MobiLens

Share (%) of Smartphone Devices

Sep-09 Dec-09 Point Change

Total Mobile Subscribers 100.0% 100.0% N/A

Sent text message to another phone 61.0% 63.1% 2.1

Used browser 26.0% 27.5% 1.5

Played games 21.4% 21.6% 0.2

Used Downloaded Apps 16.7% 17.8% 1.1

Accessed Social Networking Site or Blog 13.8% 15.9% 2.1

Listened to music on mobile phone 11.7% 12.1% 0.4

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