mts , in which 55 per cent of the equity is owned by the atlanta -based digital telecom and 45 per cent by nitel , is developing a dollars 65m infrastructure in cellular , paging , trunk radio and voice mail which will collectively serve 50,000 subscribers and already has more than 3,500 users in nigeria 's three main urban areas : lagos to ibadan , kano to abuja , and port harcourt .