Strategy Analytics tracked global smartphone shipments (sell in) grew +3% YoY in January 2021. Sales volume improved +10% YoY thanks to solid demand of digitilization triggered by COVID-19. Apple ranked the top position, followed by Samsung, Xiaomi, Vivo and OPPO etc. This report tracks global smartphone monthly shipments (sell in), sales (sell through) and inventory volumes / ratio by 32 of the world's largest vendors from January 2016 to January 2021. The report is a valuable tool for OEMs, component makers, software developers, operators and other stakeholders to track key OEMs inventory level and support their planning activities.