Vodafone Group Plc, the worldÔÇÖs biggest mobile-phone company, may expand in Africa, including through acquisitions, using Vodacom Group Ltd. as its gateway to the continent┬á Vodafone manages Johannesburg-based Vodacom, and will involve itself in AfricaÔÇÖs market consolidation as prices of acquisition targets fall, Pieter Uys, the CEO of the South African company, said in an interview on Tuesday.