@Eurosceptic Hi, welcome to the community. May I know the model number of your AC1200 adapter? Is it Archer T4E / T5E? Have you tested whether the adapter is able to connect to other wireless...

@Parallax42 Hi, It is also suggested to install the following driver: Realtek Chipset Driver for Archer T2U(Nano/ Plus)/T3U(Nano/ Plus)/T4U(Plus)/T4UH/T9UH (Win7/Win10) If possible, please also test...

@menage Hi, welcome to the community. It is suggested to refer to FAQ: Most frequently asked questions about TP-Link range extenders Q3.6 Can I use more than 1 range extender in the house? Can I...

@Baru Thank you very much. If possible, it is also suggested to disable "EasyMesh" on the Archer C6 first to see whether it helped with the Ethernet Backhaul on the Deco M4. Best regards.

@charliebob70 Hi, Thanks for the feedback. I think maybe the internet connection is not Dynamic IP when Deco M4 is connected directly to the ISP ONT. Have you input any PPPOE username and password...

@EvanWyk Hi, If you are using Android OS( such as Xiaomi, Redmi, OnePlus, Huawei/Honor, Samsung, or Asus phone), many of them support a built-in App Locking Feature to use fingerprint, PIN, or...