This study aimed to determine the extent of mobile phone utilization and learners’ academic performance. This study employed a descriptive research design using a self-made test instrument to assess the mobile phone utilization of 81 senior high school learners. The results revealed that most of the respondents were males, belonging to higher-income families, from the TVLautomotive strand, and with many siblings. Overall, the extent of mobile phone utilization by learners was great. When grouped according to variables, the extent of mobile phone utilization of learners was also great. The level of academic performance of learners when grouped according to profile variables was very satisfactory. There was a significant difference in the extent of mobile phone utilization in the areas of communication and collaboration and e-learning platforms when compared according to their sex. In addition, there was also a significant difference in the extent of mobile phone utilization in the areas of e-learning platforms and materials and equipment when compared according to average family monthly income. Moreover, there was a significant difference found in the level of academic performance of learners when compared according to sex and academic strand. Further, a significant relationship was found between the extent of mobile phone utilization and the level of academic performance of learners. This study calls for educational institutions and teachers to take action to ensure that students’ use of mobile phones and other related devices inside and outside the classroom will help enhance learning and will not negatively impact their academic performance.