High Quality Content by WIKIPEDIA articles! Vodafone Portugal, a full subsidiary of the Vodafone Group, is the second mobile operator in Portugal, both chronologically and in market share (34% in 2006). Its competitors are Optimus and TMN. Vodafone Portugal was founded in 1991 as Telecel, Comunicacoes Pessoais, S.A. (Telecel) as it won the bid for Portugal's second GSM operator (after TMN). The network went live in October 1992.In 1996, the "pre-paid" concept was introduced with the launch of tariff plan Vitamina. Telecel also held a paging license and was leader in the 4-player paging business, using the brand Telechamada.

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