@NhutNguyen With the second one would be better - check this thread - there's an early FW release for EasyMesh ethernet backhaiul.

@Archerc5usr0 You can check the router's bottom sticker for router model, exact HW version and FW region. If this router has been provided to you by an ISP then most probably its FW has been...

@Blarge To use the Tether app for managing your AX50 you need a TP-Link ID registered and bound to your router. Here's a video tutorial for that. I you have problems to login AX50 web management...

@asanguig If you want to just expand your wireless coverage why not using the C6 in AP mode (Case 1) - this way your issue will be gone.

@Netadmin123 You could try the method I used described in this story and check if will work for your C50.

@CJC71 In general when you've created a TP-Link ID, you should login via web management page with the TP-Link ID to bind it to your router: Were you able to setup an EasyMesh with an ethernet...