The aim of this study is to identify the relationships among the factors, which are smartphone usage, smartphone addiction, internet addiction and Nomophobia to the extend where how much and how each factor affects each other. The 98 respondents are from the whole UMS, Sabah campus, and are from various and different faculties and ethnic backgrounds. The smartphone usage was measured by the Smartphone Usage questionnaire which already exists and the smartphone addiction level was measured through a questionnaire from Smartphone Addiction Scale – Short Version (SAS – SV). The internet addiction level was measured through the Korean Short Version Internet Addiction Scale (KS – Scale), and lastly, the level of Nomophobia was measured through the Nomophobia Questionnaire (NMP-Q). The data were collected through Google Form and analyzed through SPSS Version 22 for Windows. The relationships among the factors, which are smartphone usage, internet addiction, smartphone addiction, and Nomophobia are found strong relationships. There is a supported relationship between smartphone usage, internet addiction, smartphone addiction, and Nomophobia.