About a Dilemma in the Telecommunications Sector: VirtualOperators or Low-cost Operators?. Periodicals of Engineering and Natural Sciences, [S. l.], v. 11, n. 5, 2025. DOI: 10.21533/pen.v11.i5.1359. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/1359. Acesso em: 14 may. 2026.