Mobile learning (m-learning) is a highly popular multidisciplinary study field around the world. It has attracted a great deal of attention from researchers in different disciplines who have realized the potential to apply mobile technologies to enhance learning. Thus, mobile learning has been defined differently by different people. This study is a review of m-learning literature for understanding and discussion of current perspectives and theories in mobile learning. Additionally, some m-learning practices that are implemented in different sectors such as corporate, university and military have been mentioned. (Contains 1 table and 4 figures.)