The Contribution of the GSM Association to the Building of GSM and UMTS Section 1: Cooperation of the Operators from the Agreement of the GSM MoU to the Opening of Service in 1991/1992 Renzo Failli 1 21.1.1 The Main Objectives of the MoU Group in the First Period of its Activity and its Organization The MoU group had its first meeting on 14 October 1987, shortly after the signature of the MoU by the mobile operators of 13 European Countries: Federal Republic of Germany (FRG), France, Belgium, Den