Not connected to 5GHz - is this important? How to solve?

remember 5.0 and 2.4 are different band widths. 5.0 allows faster send , revieve trasmitions but doesnt transmitt as far or as strong as 2.4. When planning placement of extenders or access points use a wifi analyser on your phone a - 40 is best signal and work from there- . E.m.f (electro magnetic fields ) ie refrigerators cyling electric ranges interfer with siganls as well as other wifi objects depending on the channels hand how close in frequency they are . (bleed overs). walk around your house using the wifi analyzer , look for best piont in your to repeat the wifi.  it should over lap, like 2 circles intersecting but not covering each other totally, just a bit