@Martineiro Use this guide for configuring the Archer C2 or Archer C6 in AP mode. Note: if the Archer has a dedicated AP mode in an Operation Mode menu (like C6) you should follow Case 1. If Archer...

@erdemozor If you have two different devices with the same IP address this would lead to an IP conflict in your LAN. What's the make and model of the extended router ? May be on the extended router...

@erdemozor Have you tried to reboot the C80 after removing your phone's MAC from its whitelist and test if it still behaves the same ? Also check if you're using a private MAC address on your phone -...

@keszeg Try disabling Smart Connect wireless feature and name the 2.4GHz and 5GHz SSIDs differently. Use these wireless settings and test: If still can't connect then set Version to 'Auto' and test...

@Silvan.it If you want to use your old MR600 v1 as access point to extend your wireless coverage, you can follow this guide - Case 2. The essential thing is to disable its DHCP server and put it's...

@GeorKhawam TP-Link decides when to issue a new FW release. Usually FW releases are more than only the initial one (as it is with C58HP). On question 'Why' could be answered by their support...