Mobile Becoming Focus for Social Networking

According to data released by comScore, 30% of US smartphone users access social media sites via mobile browser (they're not counting access via apps in the data). Facebook says it has 100 million are "active" mobile users around the globe. That number is destined to grow, as is the number of mobile Twitter users. 

Here's the top-level comScore data:

In January 2010, 11.1 percent of all mobile phone users accessed a social networking site via mobile browser, an increase of 4.6 percentage points from the previous year. Much of this growth has been driven by smartphone owners, 30.8 percent of whom accessed social networking sites on their mobile browsers, up more than 8 percentage points on the year. By comparison, just 6.8 percent of feature phone users accessed social networking sites on their mobile phones.

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Here's Nielsen's parallel demographic view of US mobile social networking (in the aggregate):

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Note that the female audience is larger and that older users comprise more of the mobile social network user base. The largest single group is over 35 (probably owing to the economics of mobile data plans). However what's very clear is that mobile devices are becoming a primary tool for social media access and status updates for ever larger numbers of people.