i THE INFLUENCE OF ADVERTISING CAMPAIGNS ON CONSUMERS’ CHOICE ON THE GENERAL SYSTEMS OF MOBILES (GSM) NETWORKS IN NIGERIA: A STUDY OF MTN NIGERIA AND GLO MOBILES NIGERIA LIMITED OKUJENI, RICHARD PG/MA/07/43486 DEPARTMENT OF MASS COMMUNICATION, FACULTY OF ARTS, UNIVERSITY OF NIGERIA, NSUKKA MARCH, 2009