This seems important but didn’t leave the lab

https://seekingalpha.com/pr/17710368-verizon-qualcomm-ericsson-demonstrate-dynamic-spectrum-sharing

About the trial
This latest 5G milestone in the US is an over-the-air, Dynamic Spectrum Sharing (DSS) 5G data call that was successfully carried out in Ericsson’s lab in Richardson, Texas, by Verizon, Ericsson, and Qualcomm Technologies.  Ericsson Spectrum Sharing, part of Ericsson Radio System, enables a quick, flexible, and cost-effective upgrade to 5G within existing 4G carriers. The solution will dynamically share spectrum between 4G and 5G carriers based on traffic demand. The switch between carriers happens within milliseconds, which minimizes spectrum waste and allows for best end-user performance. It is compatible with all 5G FDD capable smartphones and other devices based on the Snapdragon 5G Mobile Platform with the Snapdragon X55 5G Modem-RF System, supporting the standardized spectrum sharing functionality.

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