The purpose of this study was to investigate the at-school adolescent mobile phone consumer loyalty in terms of consumer socialization perspectives. The causal relationships of the research variables were constructed with the model of consumer socialization provided by Moschis and Churchill. 1435 valid questionnaires were recruited from twenty-five schools that are junior high schools, senior high schools, vocational schools, and community colleges. The model was analyzed by the method of structural equation modeling. The results showed that interactions with parents or media about the affairs of mobile phone consumption had significant influence on mobile phone consumer loyalty. Different from pass research findings, interactions with peers did not exercise any influence on the loyalty. Sex and age did not has direct effect on the loyalty but they could indirectly impact it via interactions with parents or media. Family social-economic status had direct effect on the loyalty and can also indirectly impact it via interaction with parents.