When I purchased it in Februrary 2019, my Archer C5400 worked OK Then I started having issues which I did not understand, until I read here that the new "QoS" (should be called PoS) feature was turned

Hi. My C5400, purchased on Amazon.fr (France), shows a "DE" country code, which is Germany. The problem is that the 2nd 5Ghz WiFi network, on auto, switches to channel 116, which my (purchased in and

Hi. My Archer C5400 shows disappointing speeds via WiFi or Gigabit Ethernet. The speeds are actually the same, so the WiFi connection seems very solid. But overall speed is disappointing. I used to ha