Personal RF-EMF measurements have been conducted in 90 adolescents during three days. Using the internet on the own mobile phone is a main contributor to total personal RF-EMF measurements. WLAN in school and at home have little impact on personal RF-EMF measurements. Personal measurements were combined with dosimetric approaches to quantify absorbed RF-EMF by the body. The own mobile phone is the most important contributor to the average absorbed RF-EMF dose of adolescents.