Please remember that 5G is a MODULATION METHOD Not a Frequency band! You can as easily apply it to 900MHz as you can to 2.4GHz or 26GHz radio spectrum! The frequency is not the modulation! You can get 26GHz AM or FM etc. GSM stands for Gausian Shift Modulation! A form of quadrature modulation that also includes a phase shift element in the coding scheme. Can be applied to almost any frequency. 3G is just 3rd Generation cellular. LTE stands for Long Term Evolution. The modulation was an evolution from GSM & 3G to provide a system that works like an ethernet router. 5G is an evolution of LTE and has included MMIMO (Massive Multi In Multi Out) that measn that there are multiple channels within the band, that your 5G has been provided on, that your phone establishes with the base station. It's like having a bunch of ethernet cables that your ISP supplies to you where the data packets are fed to you in parallel, all at a data rate of say, 1Mbps, and you have possibly 100 parallel feeds which aggregate to near 100Mbps. That's what MMIMO does. 5G is most certainly a distraction!
WiFi can be used to do that too! You don't "need" 5G to do that!
They refer to it as "5G spectrum" because that's the segment of RF spectrum that has been identified for use on 5G. It's not a spectrum designation it's a telecommunications company designation! The band you refer to is known as C-Band and originally was used only for TVRO satellite communications, security systems (radar). Within the band is also one of the ISM bands. Tom8o twomarto (sic.)