Qualcomm and partners such as Ericsson have been developing 5G for commercial use in (hopefully) 2019. The two companies have conducted data call tests for the latest release (15) of the 3rd Generation Partnership Project (3GPP) using the new Qualcomm X50 modem.
https://www.notebookcheck.net/Qualcomm-and-Ericsson-announce-first-successful-data-call-using-new-5G-standard.329432.0.html