@Suhailmyself If you have a Range Extender mode in your Archer C20 you won't have WDS option - it's either one or the other (except in TL-WR940N). In newer router models WDS has been replaced by...

@vasik006 If setting the SSIDs on C6 different than these on the main router makes re-connection smoother keep them that way - you're not gaining anything if you set them identical. If you're not...

@Pro4TLZZ Check this story - for details on available channels on the 5 GHz band using 160Mhz channel width.

@alexino Set these from here:

@Chapi92 You can't change the router FW region. As you already realized when trying to upload a FW from another region you'll receive an error message. You don't have other option except to use the...

@SolninjaA You only have a choice between two modes: wireless router and AP mode. - Case 1. AX1800 supports OneMesh only in router mode - OneMesh FAQ - Q8/A8 and Q10/A10. Here's the difference...