The display has long been the main technology that defines usability and perceived quality of the phone. As different display technologies battle for place in the phones new aspect ratios emerge to the markets. This extensive report covers the main aspect ratios forecasted by region and smartphone price tier from 2008 to 2023. The report can be used by component manufacturers, handset vendors, operators, vehicle makers and developers to identify or prioritize the most popular display features penetrating billions of mobile devices worldwide.