A recent study by Telefonica and Universidad de Navarra mentioned that 95% of people between the age of 6-18 access the Internet on a regular basis (not to be confused with Internet penetration).  The study also said that 83% of the same age demographic (9-18)  has a mobile phone.  The sample consisted of 21,774 students from Argentina, Chile, Guatemala, Mexico, Colombia, Brazil, and Venezuela.

The most popular activities online are communication - particularly instant messaging followed by social networks.  And as far as mobile goes, texting is the most popular activity - not talking.  The complete report is available at the projects website (www.generacionesinteractivas.org) / PDF 4MBs (in Spanish).