PT Portugal SGPS SA is the largest telecommunications service provider in Portugal. Since June 2, 2015, PT Portugal is a wholly owned subsidiary of Altice Group, a multinational cable and telecommunications company with a presence in France, Israel, Belgium & Luxembourg, Portugal, French West Indies/Indian Ocean Area and Dominican Republic and Switzerland. Its assets in Portugal were sold to Altice in 2015 in a move of its owner, Oi SA, to reduce debt. The African assets were mostly sold for the same reason. Portugal Telecom, SGPS SA was split in separate companies: PT Portugal and Pharol , which owns a 27,5% stake in Oi.
The first telephone experiments in Portugal connected Carcavelos to the Central do Cabo in Lisbon, in 1877. In 1882, the Edison Gower-Bell Telephone Company was established in both Lisbon and Porto, to explore the respective telephone service concessions. In 1887, the concession was transferred to APT - The Anglo Portuguese Telephone Company, which was kept by the latter until 1968, the year in which the Public Company "Telefones de Lisboa e Porto" was created. The Post Office, Telegraphs and Telephones explored until this present day, the telephone service in the rest of the country. For the exploration of radiotelegraphy and wireless telephone, a contract with the Marconi's Wireless Telegraphy Company concession was confirmed in 1922. In 1925, the "Companhia Portuguesa Rádio Marconi" was set up and took on all responsibilities of the previous concession.
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