[enkrs]

True, millimeter wave bands, introduced in 5G, don't go as far as 4G. But those bands are in the 5G standard additionally to the lower bands similar to 4G, and are beneficial in places like busy airports, train stations and urban areas. 5G does not mandate to only use the millimeter wave bands (or, for the mater of act, to use them at all).

So in rural areas 5G signals would still use frequencies similar to 4G,so the more efficient use of spectrum will improve coverage and speed.

Regarding the observation that sometimes 3G signals are better than 4G - that might as well be because 4G has problems with congestion when many clients are connected to the same base station. One of areas which also 5G is also improving.