DUBLIN--(BUSINESS WIRE)--Research and Markets (http://www.researchandmarkets.com/research/js55g5/el_salvador) has announced the addition of the "El Salvador Smartphone Market to 2015: Mobile Handset Sales by Vendor" report to their offering. "El Salvador Smartphone Market to 2015: Mobile Handset Sales by Vendor" report provides a top-level overview and detailed insights into the operating environment for mobile operators. It is an essential tool for companies active across the telecom value cha