@Jrferrier Here's an example for 2.4 Ghz wireless settings:

@Moonrart Use this procedure (method 1) to hard reset the device. If no change in the device behavior then most probably your router has a customized FW tailored for your ISP. Contact your ISP and...

@AIMAM You can choose one from the compatible list according to your needs.

@sminni Use the original cable from C6 kit to connect to the ONT modem. If the C6 WAN port still gives the message that it's unplugged use another Cat 5e/6 cable to connect to ONT modem or use...

@AIMAM A6 v2 supports OneMesh feature - check the FW release description here - Published Date: 2019-09-27

@StefanoZen Yes, for guest wireless network is the same. Since you've already tried with DECO and wi-fi repeaters and If you already bought the hardware (switches and C6 routers) then go ahead with...