The NGMN Alliance has released a white paper titled "5G Smart Devices Supporting Network Slicing". The paper provides an overview of the requirements for operating systems of 5G smartphones and the importance of network slicing in supporting these devices. The paper is intended to be used as a reference for operators, manufacturers, and other stakeholders in the 5G ecosystem. The information in the paper is current as of December 15, 2020, and is subject to change. The document is provided "as is" and no warranties are given.