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MS_VDA_GH__041 Glo network launch advertising.jpg
An orange taxi passes a green advert for Glo, a mobile network about to lauch in Ghana, May 2010, Liberia Road, Accra. Caller Tunes change the ringing tone people hear when they ring you. In August 2009 Vice President John Dramani Mahama spoke about the possibility of the  National Communications Authority (NCA),applying sanctions  to mobile operators where networks had become congested. Claims about network reliability became common marketing messages.