Huawei and Swiss wireless provider Sunrise achieved a record speed of 3.67 Gbps downlink with multiple 5G smartphones in one 5G cell in Zürich, the two companies reported. What makes this feat even more impressive is that it was accomplished using sub-6 GHz radio frequencies, which have a greater range, but generally enable slower speeds than the short-distance millimeter wave spectrum being used for 5G network deployment in the U.S.