Mobile handset shipments experienced a slowdown in the United States and Canada in Q1 2012, while volume growth in Brazil and Mexico well out-paced the global +4% growth rate. Samsung maintained top spot in Brazil, while Nokia regained the leading position in Mexico. Apple continued to ramp up across Canada and the US, in both of which it holds a solid number two position thanks to an expanded operator presence and a multi-tier iPhone family. This published report, available for download to clients of our Handset Country Share Tracker (CST) service, tracks quarterly handset shipments and vendor marketshare for 4 major countries in North and South America from Q1 2009 to Q1 2012. They are Brazil, Canada, Mexico and USA.