This research aimed to determine the effectiveness of application techniques of the third generation mobile phones on developing the environmental concepts and trends for a group of university students. This is throughout applying it on a group of (40) male and female students in the experimental group ،these students have been picked from the Faculty of Education, Arabic Department, Ain Shams University. The results have pointed out the effectiveness of the suggested training course and environmental activities downloaded on mobile phones applications (Whats-App) for the experimental group, in view of the results, we have reached some recommendations such as: the necessity of using mobile phones and their applications in the educational process in general and to develop the concepts and trends towards the environment for the university students in particular. Key words: mobile phones applications, environmental concepts, and environmental trends).