The Effectiveness of Computer-Assisted Language Learning (CALL) by Smartphones to Increase English Proficiency of Papuan EFL Students

This study aims to find out the effectiveness of Computer-Assisted Language Learning (CALL) by smartphones increase English proficiency Papuan EFL students. The mixed method was implemented specifically related explanatory sequential design (Quantitative-Qualitative) where research comprised two interactive stages. first stage carried collecting and analyzing quantitative data using pre-experimental difference before after being given treatment. samples were determined purposive sampling 30 students selected, analyzed SPSS. second qualitative structured interviews. also, 7 considered representative obtain data. results show that is effective a significant 38.70%. this learning cannot be separated from aspects efficiency, flexibility, accessibility supported excellence in terms visualization auditory systems. Moreover, some factors certainly become constraints including internet networks, small screens, notifications advertisements, lack towards applications, unsupported smartphones, battery power. By solving all these constraints, CALL can more applied teaching learning. implication provides better change world education through strategies utilizing technology especially certain context conditions Papua.