Finally, it happened!!! Thanks to @Rickysin, @JB701 @igloo and others I got my net working on Archer C6 using WDS. Changing the channel for 5G ssid from auto to 44 did the trick. Now connection is stable and it is working good.
Getting similar speeds as on Nokia, now comes the installation of the router in the central room.
Getting similar speeds as on Nokia, now comes the installation of the router in the central room.