The different types of 5G

There are different versions of 5G - we shouldn't really have to talk about these in terms of the actual experience of using our phones, but the fact is that they're used by phone networks/carriers for different purposes and do affect coverage. And also carriers are using names for these different types, too. 

Know more: IT analyst jobs

So here we're going from fastest to slowest and also from radio waves with the shortest frequency wavelength to the largest. 

5G+ or mmWave

The name millimetre wave (mmWave) refers to its wavelength - it's the shortest wave version of 5G and brings the greatest speeds. The problem is that the waves can't go that far; they have difficulty navigating bodies let alone walls. It's being used in the US but it's not in the UK yet (some expect it to arrive this year). 

It's for central city areas where high capacity/dense coverage is required.

As for the US networks, Sprint doesn't have it, but Verizon calls it Ultra Wideband, AT&T calls it 5G+ and T-Mobile just refers to it as mmWave at present.