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ABSTRACT: In learning simulated digital communications students class X using PC-s school. Departing from a trend that-s smartphone become a lifestyle that could not be separated from lives in the 4.0 era, which constitute from the study is how many students class X of TKR ( Teknik Kendaraan Ringan ) and TMP ( Teknik pemesinan ) using smartphone in learning, so the purpose of research was seeing significant influence of use smartphone as a source of learning (e.g. ebook and browsing ) learning about matter of learning achievements class students X of TKR and TMP.The methodology this is qualitative and samples from research is all population is. An instrument used in this study the interview and the questionnaire. This study conducted in a private vocational high schools in Tasikmalaya.