Background: Addiction to smartphones is a prevalent phenomenon in university students, and could lead to detrimental effects on humans' physical and mental health. Objectives: This study aimed to assess the association between addictions to smartphones and sleep quality and insomnia measures among university students. Patients and methods: A sample of 100 university student addicted to cell phones were included and assigned into two equal groups. Group A consisted of 50 male students while group B included 50 female students. Smartphone addiction level was examined by using the short version of smartphone addiction scale. The Pittsburgh sleep quality index, and the insomnia severity index were employed to assess sleep quality and insomnia severity respectively. Results: The results of correlation analysis revealed a significant positive correlation between smartphone addiction and quality of sleep (rho= 0.454, p < 0.001) with higher values for females compared to males (rho= 0.568, 0.40 with p value<0.001). Similarly, there was a significant positive correlation between smartphone addiction and insomnia (rho = 0.31, p < 0.001) with female students being significantly higher than males (rho=0.284, 0.24, P<0.001). Conclusion: This study showed that being addicted to mobile phones could negatively impact students as the addiction level increased, the sleep quality affection, and insomnia severity were also increase.