Global smartphone shipments declined by -9% annually in Q4 2017. Most of major countries including China and the US declined while India and Russia grew its shipments YoY. Apple became no.1 smartphone vendor in the majority SEVEN countries while Huawei defended no.1 position in its home China, and Xiaomi rose to no.1 in India for the first time. Our extensive report tracks the world's 25 leading smartphone 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 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.