This study aimed at the frequency and type of using cell-phone by high school students. The research method used was a descriptive-survey one. The statistical society included all the high school students in Mazandran in 2010-11 academic year. The sample was chosen through multi-stage stratified random sampling method and 383 subjects were selected based on Kerjecie and Morgan's Table. A researcher- made questionnaire was used for collecting data. The content validity of the questionnaire was confirmed by related experts and its reliability was calculated through Cronbach Alpha by SPSS software 0/80. Two statistical methods were use in analyzing the gathered data, namely, descriptive statistics including: frequency, standard deviation and mean along with inferential statistics including: independent t test. The results showed that majority of the students had a cell-phone and consider it as a necessary tool. The girls were reported to use cell-phone and its tools more than the boy students. However, boy students used it more than girls for educational and learning purposes. There was no significant difference between boys and girls in using cell-phone for the sake of fun and social interactions.
