Taking into account the changes caused by digital technologies in the teaching-learning processes, this dissertation aims to investigate whether there is a relationship between nomophobia disorder and learning strategies and the belief in self-efficacy in the learning process of university students. As main theoretical references, we have: King, Nardi, Cardoso, Yildirim and Correia to support the theory of Nomophobia. To talk about learning strategies and self-efficacy beliefs, we start from a socio-cognitive perspective, more specifically, Albert Bandura s Social Cognitive Theory and authors who use it as a reference as a theoretical basis (Zimmerman, Polydoro and Boruchovitch). This investigation used a mixed method and data production was carried out in two stages. In the first stage, we launched an online form with a characterization sheet, the Self-Efficacy Scale in Higher Education, factor 1 of the Learning Strategies Scale for university students and the Nomophobia Questionnaire in its adapted version. 257 university students participated in the first stage. For the second stage, individual semi-structured interviews were carried out with five students selected from the base of the first stage. The results point to a positive correlation between the inability to communicate and self-efficacy in actions and in higher education and the total score of the Self-Efficacy Scale in Higher Education. There was also a negative correlation between all self-efficacy factors and the total score on the nomophobia questionnaire with the cognitive and metacognitive self-regulation strategies dimension of the Learning Strategies Scale. The data produced can contribute to understanding the relationship between digital technologies and the learning process. Likewise, they help to understand the perception that students have about their ability to perform academic tasks using these technologies and how they use them in cognitive and metacognitive strategies. We believe that, in general, this research can contribute to the awareness of the negative effects of dependent cell phone use and help students to develop self-regulated learning strategies. In this sense, we believe that the development of self-regulation and the use of self-regulated learning strategies, as well as encouraging the conscious use of digital technologies, can contribute to preventing the deleterious effect of nomophobic behaviors on the learning process.