Global handset shipments dropped -3% annually in Q4 2017. Only FOUR countries including Brazil, Russia, India and South Africa posted the positive annual growth while most countries including USA and China decreased annually. Samsung and Apple tied to become no.1 handset vendor in 7 countries each. Our extensive report tracks the world's 30 leading handset vendors' shipments and marketshare across 15 major countries worldwide from Q1 2012 to Q4 2017. The 15 countries tracked account for 7 in 10 of all global handset volumes. Countries covered include: Brazil, Canada, China, France, Germany, India, Italy, Japan, Mexico, Russia, South Africa, South Korea, Spain, UK, and the United States.