America Movil’s Mexican unit Telcel announced a national roaming agreement with Telefonica’s Movistar, its closest competitor in the market.

According to a brief statement, Telcel will provide Movistar customers access to its network in areas where it currently does not provide mobile coverage. The move will no doubt allow Telefonica, the country’s second largest player, to boost its 4G presence in Mexico.

The move comes two years after Mexican regulator IFT implemented new regulations designed to reduce the dominance of America Movil in the country, which involved opening up the market to more competition, as well as cutting national roaming charges.

US operator AT&T entered the market last year, after acquiring two of the country’s smaller operators, and has been steadily building up its presence.

However, despite the efforts, America Movil’s Telcel still controls approximately two thirds of the country’s market share.