Global handset shipments grew by nearly 2% annually in Q1 2018. Three of the top 5 vendors showed positive annual growth. Developed markets, particularly North America, are seeing lengthening replacement cycles. These mature and saturated markets where handset penetration nears 100% and in some cases exceeds that have little room left for new growth in handset shipments. This report details quarterly handset marketshare for the world's top 30 vendors in North America, Central & Latin America, Western Europe, Central & Eastern Europe, Africa Middle East and Asia Pacific for Q1 2018. Historical data by region and quarter from 2004 to Q4 2017 are included.