The current study aims to investigate university EFL learners' experiences of using their smart phones for developing language-learning skills (speaking, listening, reading and writing) as well as their attitudes concerning smart phones use for learning English. The participants of this study were 603 students (males= 285; females= 318) enrolled in different majors of study (English, Health, Social and Applied Sciences). The researcher used questionnaire and interview tools to collect the required data. The findings of this study show that all participants have used their smart phones for developing language-learning skills. They report that the most frequently learned skill acquired through smart phones is listening, while the least frequently learned skill is writing. Both male and female learners have positive attitudes towards using smart phones for learning English. Even so, female learners were more positive than male learners and the difference between genders was statistically significant, which means that gender is a significant variable.