Teens' cellphone habits may have thwarted sales of Microsoft's Kin before they even begin, according to new study. Even though Kin requires a $70 smartphone plan with no built-in text messaging, Pew Research shows that just 27 percent of teens actually go online and 72 percent of them text message their friends. Most of the new phones' e-mail and social networking would actually go unused as just 23 percent visit social networks and 21 percent send e-mail.
