Students (n = 317; aged 8-15) were assessed for mobile phone use (i.e. time as a metric for RF exposure) via both questinnaire and network operator records. In initial studies, 11-15 yr olds (n = 317 initially, n = 283 follow-up after 1 yr) were evaluated using computer based verbal tasks to determine reaction time, decision making, working memory, attention, learning, personality traits, hearing, and blood pressure. Testing occured during school hours in cooperation with the schools. The protocol allows for follow-up testing at 5, 10, and 20 yrs. In initial presentations, the authors report slightly faster and less accurate response among mobile phone users, with similar results whether voice or SMS use suggesting the influence of RF exposure is unlikely. In related studies, a modified version of the INTERPHONE study questionnaire was provided to students about phone use and tests were made to determine cognitive function. The authors report 94% of the subjects used a mobile phone, 77% owned a mobile phone. They conclude children and teens are less likely than adults to provide accurate recall of use, and greater mobile phone use was associated with faster response and less accuracy.