According to the survey, older teen girls, ages 14 to 17, were among the most likely to say their phones were the primary way they access the Web. And while young people in low-income households were still somewhat less likely to use the Internet, those who had phones were just as likely — and in some cases, more likely — to use their cellphones as the main way they access the Web.
It means that, as this young generation of "mobile surfers" grows and comes of age, the way corporations do business and marketers advertise will only continue to evolve, as will the way mobile devices are monitored.
Already, many smartphones have restriction menus that allow parents to block certain phone functions, or mature content. Cellphone providers have services that allow parents to see a log of their children's texts. And there are a growing number of smartphone applications that at least claim to give parents some level of control on a phone's Web browser, though many tech experts agree that these applications can be hit-or-miss.
Despite the ability to monitor some phone activity, some tech and communication experts question whether surveillance, alone, is the best response to the trend.
Some parents take a hard line on limits. Others, not so much, says Mary Madden, a senior researcher at Pew who co-authored the report.
"It seems like there are two extremes. The parents who are really locking down and monitoring everything — or the ones who are throwing up their hands and saying, 'I'm so overwhelmed,'" Madden says.
She says past research also has found that many parents hesitate to confiscate phones as punishment because they want their kids to stay in contact with them.
"Adults are still trying to work out the appropriate rules for themselves, let alone their children," Madden says. "It's a difficult time to be a parent."