Qualcomm unveiled its second generation 5G modem - the Snapdragon X55. It pushes wireless speeds up to 7Gbps, but more importantly it also supports 4G LTE as well as "legacy" technologies like 3G and 2G. The X55 supports both flavors of 5G, mmWave (high-bandwidth) and sub-6GHz (better coverage). And it works on both TDD and FDD networks so it can be used in devices for the West and for China. On a mmWave network, the modem can gulp up 8000MHz bandwidth (with 2x2 MIMO) for a whopping 7Gbps download and up to 3Gbps upload. In sub-6GHz mode it goes up to 100MHz bandwidth and 4x4...
Source: https://www.gsmarena.com/qualcomms_new_x55_modem_supports_5g_speeds_up_to_7gbps_but_also_lte-news-35586.php
