ResearchAndMarkets released a report that addresses several current technologies (as well as their markets, applications, and other characteristics) that, according to the ITU classifications, are transitioning to the 5G communications era. The 5G wireless communication system will be a converged system with multiple radio access technologies integrated together. It will be able to support a wide range of applications and services to comprehensively satisfy the requirements of the information society by 2020 and beyond. In 2019, in 2019 market share of 4G networks was not more than 7%-12% on the global scale.
Source: https://www.helpnetsecurity.com/2021/04/22/5g-communications-era/