In this paper we present findings from a study of students' use of mobile phones in a biology course at the Norwegian University of Science and Technology (NTNU). Using a qualitative research approach we focus on how mobile phones can complement and add value to the educational challenge of encouraging university students to obtain some topic knowledge prior to their lectures. In the course material short video-recorded highlights of upcoming lectures were available on the university's learning management system (LMS). The students used WLAN / 3G mobile phones or PCs to view the videos. All in all, the participants were excited about the new learning opportunities in the course and the findings suggest that the use of videos and mobile phones contributes positively to student learning activities.