News Celtel Sierra Leone Reaches Tongo Field By Oluniyi D. Ajao - 15th December 2005 Sierra Leone’s leading mobile phone company, Celtel Monday officially launched its network in Tongo East of the country. RelatedIXPN Reaches 1Tbps Milestone: A New Era for Nigeria’s Internet ExchangeSouth Africa's NAPAfrica Reaches 4.5Tbps Traffic Milestone