The study aimed to examine the factors affecting the problematic mobile phone use of university students (n=2.110). The study was conducted at a university in Turkey between April and May 2018. The students were found to have an above-average level of mobile phone addiction, an average level of deterioration in social relations, having problems as a result of using a mobile phone below the average, and using problematic mobile phones. The scale scores of girls were higher. It was determined that as the education level of the parents increased, the addiction scores of the students increased. Being aware of the problematic status of university students' mobile phone usage can help raise awareness about the issue and take necessary precautions.