R6400 - slow wifi but fast cable
Have a R6400 upgraded to latest firmware. It gets it connection from a cable boks which is 100/100. If I connect a cable directly to the cable boks, I get 100/100 speed. If I connect a Cat 5 cable to my router (connected to the cable box) I also get 100/100 speeds. However, when I connect to my wifi hotspots I am only able to get around 25-30/15-25 (up/down). I am using both 'normal' and 5g. I am a little in the woods (have restarted and all that) to what I should be doing to get a proper up/down speed on wifi - is there anyone here with hints or ideas?