Vocabulary knowledge is deemed by both first-language and second-language researchers to be of great significance in language competence, and learning sufficient amount of vocabulary knowledge seems to play an indispensable role in EFL and ESL contexts, so new ways of enhancing this process should be sought. One of these ways is the overwhelming and innovative Mobile Assisted Language Learning (MALL) technologies which have inspired students, teachers and researchers; therefore, the present book has a great potentiality to contribute to TEFL not only from the theoretical perspectives but also from the pedagogical vantage points. Its significance can be predicated on the assumption that with a limited amount of in-class teaching time, it sounds crucial to look for other ways which conveniently provide language learners with substantial language learning experience, and since there is a little empirical research on learning vocabulary via text-messaging , its contribution and significance can be of great use.