Global handset shipments declined by nearly 6% annually in Q4 2018 and by over -3% YoY for the full year. Just two of the top five vendors showed positive annual growth in the final quarter of the year. 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 market share 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 Q4 2018. Historical data by region and quarter from 2004 to Q4 2018 are included.