One of the features of 5G is support for high-frequency (30 GHz+), high-bandwidth, small cell networks. Most(?) of the 5G deployments are planned to be of this type.
I am a software researcher in the field and I do not think this is the case. Most 5G deployments for the foreseeable future will be on 3.5Ghz. I do not think mmWave (30Ghz+) has been accepted for commercial use in any country. In fact, in many roadmaps mmWave is referred to as 5G NR (new radio), which to my understanding was left for later deployments. To give you an idea why: the mmWave receivers and transmitters (at my current facility) are the size of a door. I think the problem is shrinking those doors to fit your smartphone, but then again, I do not work on the physical layer nor have much insight regarding regulations.
RF bands 5G: n261 (27.5-28.35 GHz); n260 (37-40 GHz)
4G: B2, B4, B5, B13, B46, B48, B66
Verizon launched 5G New Radio (Nonstandalone) at 28 GHz with 400 megahertz of TDD spectrum — which doesn’t include the LTE anchor carrier, SRG said. Based on its initial survey, the firm estimated that there are close to 100 5G nodes in downtown Minneapolis, although it had yet to confirm how many of those were on-air. Each node has two Ericsson AIR 5121 5G radios, according to SRG.
https://www.motorola.com/us/products/moto-mods/moto-5g#specs
https://www.rcrwireless.com/20190405/test-and-measurement/pu...