Global smartphone shipments declined significantly by -17% annually in Q1 2020, mostly due to Covid-19. All major 15 countries including China, USA, India and Russia registered negative growth YoY. Samsung became no.1 smartphone vendor in the majority Nine countries while Apple became no. 1 vendor in Four countries. Huawei and Xiaomi kept no.1 in China and India respectively. Our extensive report tracks the world's 25 leading smartphone vendors' shipments and marketshare across 15 major countries worldwide from Q1 2012 to Q1 2020. 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.