What is wrong with this router, have to play with it constantly as my wifi speeds are all over the map? I've never been so dissapointed for the money I spent, I have tried the fixes without using the phone app and it works for maybe a day the the wifi speeds return to slow sluggish nightmares, I'm on the 750mbps fibre and can get wireless over 600mbps when a fresh install happens but then within a day it is down to 350mbps if not worse. Driving me crazy as the 2.4 networks comes to an absolute crawl. Is it to many devices or what? I have about 38 devices, just very frustrating when I have seen the router work so well then completely fall apart. Is it the QOS that a guy cant disable? I leave that at standard and dont touch anything once router is set up with laptop. Thanks