Today, mobile technology is a growing trend in learning languages. A mobile technology like smartphone is used by university students in their daily lives anywhere and anytime. There are number of language learning applications on smartphone that can help develop students’ language skills. The present study aims at investigating how the students perceive the usefulness of smartphone for learning English and how they use it to improve their linguistic skills. A 30-item questionnaire was administered to 513 students in the university of N’djamena and Doba. The data collected from respondents were analysed using basic descriptive statistics. The Findings reveal that there is a high positive agreement toward engagement in using smartphone as tools for learning among EFL students. In addition, it was found that students mostly embark into some linguistic activities (listening and reading) which help gain more practice on some skills than the others (writing and speaking) through their smartphone.