@Digger
The wireless broadcast from a terrestrial broadband router is either 2.4Ghz or 5Ghz (where the G is for Gigahertz)
As @Chrisee indicates, 4G and 5G are cellular broadband technologies broadcasting from masts and typically used by smartphones: the G there is for 'generation', so 5G succeeds 4G.
Sky Broadband is not cellular, but Sky Mobile provides data SIMs.
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Sky Glass 55" (on ethernet) & two Stream Pucks (one ethernet / one WiFi)
BT Halo 3+ Ultrafast FTTP (500Mbs), BT Smart Hub 2
