If I am not mistaken, Vodafone was allotted mmWave spectrum where others tested with the traditional 3.5 Ghz 5G spectrum, hence the high speeds. Practically, in commercial deployments users will not receive these high speeds even with mmWave deployments unless you live under the tower. These high frequencies are susceptible to even glass pane windows, let aside walls. Use cases can be stadiums, or areas with very high footfall.