DUBLIN--(BUSINESS WIRE)--Research and Markets (http://www.researchandmarkets.com/research/hj46lf/el_salvador) has announced the addition of the "El Salvador Smartphone Market to 2015: Mobile Handset Smartphone Sales by Vendor and by Operating System" report to their offering. "El Salvador Smartphone Market to 2015: Mobile Handset Smartphone Sales by Vendor and by Operating System" report provides a top-level overview and detailed insights into the operating environment for mobile operators. It