Entel installed microwave networks in almost the entire national territory and built in 1968 a satellite station in Longovilo 40 miles (64 km) south west of Santiago, a Latin American first.

Entel's activities initially were data transmission and communications service, long distance telecommunications according to the wishes of CORFO.

In June 1996, the Board of Directors authorized an increase in capital that allowed the entry of Telecom Italia, which acquired another 19.99%, sharing control with the Group Chilquinta.

In 2006 Entel sold its entire share in Americatel Central America SA and their direct and indirect subsidiaries, BVI Holding Isela Inc. under contract Stock Purchase Agreement ("SPA").

As part of the deal, Entel would continue to offer internet services for residences on ON*NET's fiber optic network.