The document discusses the use of mobile devices, especially cell phones, in English as a Foreign Language (EFL) teaching and learning in China. It notes that cell phone ownership is widespread in China and that cell phones can be used for voice calls, SMS, browsing, downloading, cameras, and gaming to enhance EFL education. Some potential benefits of using cell phones for EFL discussed are installing a campus cell phone system, upgrading the SMS system, allowing online access to educational materials and tests, and downloading materials for later review.