The Pew Research Center’s Global Attitudes Project recently published a report on globaly technology usage. Among the findings interesting to this blog were those on SMS usage and mobile Internet access.
According to Pew, a full 75% of mobile users on average (in 21 countries) use SMS. Mobile Internet usage is less according to the data: "more than four-in-ten mobile phone owners use their device to go online in Israel (47%), Japan (47%) and the United States (43%).
If there are roughly 240 million adults in the US and 85% of them own mobile phones that's 204 million adults with mobile phones (comScore uses a base of 234 million adults with cell phones). Pew's data then argue that about 88 million access the Internet on their mobile phones.
By contrast Nielsen's data assert that there are now 100 million mobile Internet users in the US. Certainly if mobile phone owners under 18 are included we've easily crossed that threshold.