Samsung this week debuted its latest flagship, the Galaxy S21, with across-the-board feature advancements and, of course, support for non-standalone and standalone 5G both sub-6 GHz and millimeter wave. Of interest n terms of network compatibility–especially to T-Mobile US users–is the inclusion in some regions of Qualcomm’s Snapdragon 888 5G Mobile Platform which supports aggregation of TDD and FDD spectrum.
Why is that important to T-Mo subs? The carriers has a nationwide standalone 600 MHz 5G network and is rapidly building out coverage in non-standalone mode using the 2.5 GHz spectrum that came from its acquisition of Sprint. The Snapdragon 888 will allow aggregation of those two bands.