Which networks are currently 5G?
The Androids. LG Velvet has 5G now.
None. 5g requires a fiber network and more towers.
AT&T. T-Mobile, and Verizon.
Both AT&T and Verizon have rolled out 5G in major cities, Verizon more so than AT&T. . . Most of the others ride on the coat tails of the big two, leasing bandwidth from them, so if their lessor is 5G, they will be too. It will be some time before 5G reaches smaller cities and the boonies. Even in the major cities, it is not everywhere available, concentrating in business districts and more affluent neighborhoods.
BIGGirl, only some Android phones at the higher end are 5G. Android is not a network. Android is a platform.
Verizon offers millimeter wave version of 5G, delivers 4Gbit second. Apple testing in cooperation with Verizon found the Pro Series phones delivered 3.5 Gigabit down and 200 Megabit upload capabilities.