This document discusses using mobile learning (m-learning) to enhance English as a foreign language (EFL) instruction. M-learning extends e-learning by using handheld devices anywhere and anytime. Six common themes in m-learning studies are identified: 1) increasing access to education, 2) promoting active learning, 3) encouraging constructive learning, 4) enabling informal learning, 5) assessing student and teacher attitudes, and 6) measuring student achievement. Examples are provided for each theme from previous m-learning research studies conducted in various countries.