Global smartphone shipments grew +43% annually in Q1 2012. This published report -- available to download by clients of our Country Share Tracker (CST) service -- tracks the world's top 5 smartphone vendors' shipments and marketshare -- Samsung, Apple, Nokia, RIM and HTC -- at 15 major countries worldwide in Q1 2012. The 15 countries tracked account for 76% of total global smartphone volumes. Countries covered include Brazil, Canada, China, France, Germany, India, Italy, Japan, Mexico, Russia, South Africa, South Korea, Spain, UK, and the United States. This report is a valuable tool for any mobile stakeholder that wants to track smartphone vendors' operational performance at a granular country level. For example, Samsung leads the market in China but not in Japan.