@JJMartin I see, you can return it and get a new device which supports QoS, like Archer C7, Archer A9 and Archer A10 and so on. May it help.

@SSMP Thanks for your requesting. First, except reboot the router, please check the system time of the Archer A9; you can login to the web UI locally and go to advanced-system tools-time settings to...

@Ismail_Hossain Sorry for that, so the TL-WR820N works in regular router mode and the wired connection is good, but wifi connection is unstable? Try to change some wireless settings to improve its...

@horace_vr Below is the instruction to setup the WDS feature to boost the wifi signal. https://www.tp-link.com/support/faq/227/ Please use the same password of the main router ( Archer C2) to...

@Benforest Sorry for the inconvenience, I get your point. We have noted that and forwarded to our product department about this request. They will work on it and evaluate the feasibility to improve...

@Grw Do you misspell it? -- PC directly to c2600 by cable according to the test you linked to is 1.0Bbps. Is it 1.0Gbps? You can try to change the Archer C2600 to access point mode and connect it to...