This study examines the determinants of mobile phone among the university students special reference to Rajarata University of Sri Lanka. The sample is selected by using stratified sampling method. The data collected through 10 mixtures of open and closed questions. The study used mainly primary date but secondary data too used in books and internet sources. This research is hypotheses that monthly income is the most effective factor for university students’ demand on mobile phone and phone’s facility is positively affect to mobile phone demand. Results of the study reveals that there is a possitive and significant relationship between mobile phone demand and income levels among university students and facilities provided by the phone is not possitively affects on mobile phone demand . However, the study suggested that a country level study in this regard will be more helpful for mobile phone producers and their marketing strategies.