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Literature in Nigeria has thus far concentrated on the adoption of mobile technologies especially feature phones, hence, this paper deployed Rogers ’ innovation adoption theory to explain the factors that influence the adoption of smartphones among undergraduate students in Nigeria’s first state-owned university, Ambrose Alli University, Ekpoma, using data collected from 226 students. The findings of this study reveal that, relative advantage and complexity were the only technological characteristics that explained adoption. Contrary to Rogers ’ theory, trialability, observability and compatibility with life style could not adequately predict adoption. In addition, socio-demographic characteristics could not sufficiently predict undergraduate students ’ smartphones adoption. For communication factors, except for interpersonal communication, mass media use did not have a significant relationship with adoption of the technology. This study is limited to respondents selected from one university using a questionnaire. Apart from providing policy information to the university who may also want t