Dubai based GSM service provider, Etisalat, has announced that its subscriber base in the Country has increased to 15 million, signalling a remarkable improvement in its drive to be a key player in the fast growing mobile Industry.Dubai based GSM service provider, Etisalat, has announced that its subscriber base in the Country has increased to 15 million, signalling a remarkable improvement in its drive to be a key player in the fast growing mobile Industry.