The Lenovo Flex 5G is the first "Always On, Always Connected" ultrabook to launch with the connectivity that gives it its name. It is capable of the ultra-wideband (UWB) variety of the same, which covers a lot of the mmWave band. Accordingly, it will be sold through the carrier Verizon in the US.
https://www.notebookcheck.net/Verizon-launches-the-Lenovo-Flex-5G-in-the-US.476648.0.html