This paper describes the theoretical framework and the use of 4G cellular telephony networks in the Microregion Turística das Lagoas located in the Argentine province of Santa Fe (SF), specifically in the city of Melincué. This work intends to map the 4G mobile networks in this place with the objective of making available a report on the current situation of these networks through the OpenSignal / 4Gmark applications, considered two the best tools currently, then identify the locations that present problems and determine their possible causes, view that Melincué is considered one of the most important cities of this tourist microregion. Finally, a future work will be shown to improve the problems detected.