Place your mobile at a distance where you cannot see or hear it. Smartphones are designed to attract your attention, among other things with the help of notifications. This greatly disrupts learning because to learn well you need your full attention. The further away the mobile phone is, the better you can learn. Because you have no distractions (or think you will have none), you are much better concentrated (see image). Just looking at the mobile phone takes you out of your concentration for an average of 2 minutes. So, for example, leave it downstairs in the kitchen while you study in your room upstairs, or put your smartphone on airplane mode so you no longer receive notifications.
Beland, L. P., & Murphy, R. (2016). Ill communication: technology, distraction & student performance. Labour Economics, 41, 61-76.
Chen, Q., & Yan, Z. (2016). Does multitasking with mobile phones affect learning? A review. Computers in Human Behavior, 54, 34-42.
Felisoni, D. D., & Godoi, A. S. (2018). Cell phone usage and academic performance: An experiment. Computers & Education, 117,175-187.
Thornton, B., Faires, A., Robbins, M., & Rollins, E. (2014). The mere presence of a cell phone may be distracting. Social Psychology.
Ward, A. F., Duke, K., Gneezy, A., & Bos, M. W. (2017). Brain drain: The mere presence of one’s own smartphone reduces available cognitive capacity. Journal of the Association for Consumer Research, 2, 140-154