Almost $20 billion. Hottest markets are in random order:
San Francisco, CA
Los Angeles, CA
The 5G icon is controlled by a parameter called upperLayerIndication, which is a part of system information block 2 of LTE. A value of true just means that LTE carrier/channel supports ENDC (aka it could be the LTE anchor for NSA 5G). Without looking at engineering screens or using an app like SignalCheck, you can’t actually tell if you’re connected to a 5G radio bearer.