More stats which you knew in your head all along (though those Sorrent stats seem a bit high – but I’m not complaining):

From Rider Research:

Some 16 million teens and tweens in the states own cell phones, according to NOP World Technology. Its “mKids Study” reveals that nearly half–44%–of 10- to 18-year-olds own a wireless phone. The study was conducted in the top 25 markets and found that ownership among 12- to 14-year-olds increased from 13% in February 2002 to 40% in December 2004. The majority–73%–of 18-year-olds own cell phones, a 15% increase from 2002. Some 75% of 15- to 17-year-olds carry cell phones, up from 42% in 2002.

From Businesswire:

Sorrent partnered with research firm U30 Group to study the usage and purchasing behavior of consumers of mobile entertainment.; Among the research findings which will be released in greater detail in the coming weeks was the emergence of “tweens,” defined as youth ages 10 to 13 years old, as the market segment with greatest frequency of mobile gaming In addition, results showed tweens as among the top segments in overall usage of mobile content. . Tweens: Generation Mobile Tweens led mobile game usage in this year’s study with more than 84 percent playing mobile games one or more times per day. This compares to 64 percent of the general population of mobile gamers playing one or more times per day. In addition, nearly 80 percent of tweens play games on their phone while at home and more than 40 percent share mobile games and entertainment with family members and friends. Beyond gaming , Sorrent’s research found tweens to be active users of other mobile applications. 82 percent of tweens actively text message, 83 percent use ringtones and half of tweens surveyed use picture mail.