Teens, tweens and phones -- by the numbers:
-- 75 percent of all youths ages 12-17 owned a cellphone in 2009. That's up from only 45 percent in 2004.
-- While the majority got their first cellphone at age 12 to 14, the trend is down to as young as 5- to 9-year-olds.
-- 54 percent of all teens text daily, up from 38 percent in 2008.