Do you mean 2.4ghz (and 5ghz)? Those are terms for wifi. When I hear of 4g and 5g I think of my cellphones mobile data. Wyze stuff only work on the 2.4 ghz wifi signal.
When I ask about wall construction, just wanted to know the makeup. My exterior walls have tons of insulation,.and are thick because it gets below freezing for months at a time. Down south where it’s hot, walls are thinner. Wood, vinyl and brick are common exteriors up here and both affect Wi-Fi differently, brick especially attenuates Wi-Fi signal a lot. Saying "normal"doesn’t help “painting the picture”. Is there plumping? Other wires in the area? All effect the wifi signal so that’s what I was looking for when asking construction makeup.
I had an all in one router from my isp, and they are known to be horrible for wifi quality. I bought an access point and out it’s in the most optimal place I could and I don’t have any more Wi-Fi signal issues anywhere in my house that I had when I mainly used the all-in-one router. Another option is a mesh system, which has been talked about in the forums here a lot which improves Wi-Fi signal throughout the house.