Cell phones are now well integrated into the lives of American teens and their families.²⁵ As of September 2009, 75% of American teens ages 12-17 have a cell phone, a number that has steadily increased from 45% of teens in November 2004. Fully 90% of parents of teens ages 12-17 have a cell phone, a percentage that has remained steady since 2006. Cell phones have become increasingly important modes for intra-family and external communication. For families reached for this survey on a landline who have both cell phones and a landline in their lives, one-quarter (23%) of parents report that they receive all or almost all of their calls on a cell phone, and another half of parents (54%) say that they receive some of their calls on a cell phone and some of them on a landline phone. In total, 8% of American families with teens ages 12-17 in the household do not have a landline telephone at all. And 29% of all families with teens received all or almost all of their calls on a cellular phone.