The global smartphone market will maintain steady growth till 2022. We predict 5G enabled smartphones will emerge from 2019, but it will start to ramp up volumes from 2021 onwards. 4G has replaced 3G as the world's dominating smartphone air-interface in 2015, the trend will maintain by 2022. Meanwhile, EDGE (2G) smartphones will quickly sunset as chipset makers and device OEMs shift to the HSPA+ / LTE tracks. Our report forecasts global smartphone sales by 19 technologies from 2007 through 2022. The report is a valuable tool for component vendors, device manufacturers, operators and other stakeholders who want to map the future penetration of 3G, 4G and 5G protocols in the high-growth smartphone category.