@carlosnino Hi, I am afraid not, for MR6400, the Ethernet WAN and 4G internet cannot work at the same time, under wireless router mode with 4G backup, it will only failover to 4G internet when the...

@Npastori Hi, do you mean all LEDs on the extender will turn off and then power starts flashing and other LEDs turnning on later, then after few seconds, the whole process repeats? Please try...

@Will77 You mean you are connecting a DSL cable directly to the WAN port of Archer AX1800? If so, it will not work, the Archer AX1800 is a router only and needs to connect internet via Ethernet...

@lukenz As @terziyski mentioned, please install the latest beta firmware in that thread, which has solved the reported issue as mentioned in this reply:...

@tpdigi When tether is used on the same network as the TP-Link device, please check if it creates the info message log or not.

@Zdzislaw To assist you efficiently, I've forwarded your case to the TP-Link support engineers who will contact you with your registered email address later. Please pay attention to your email box...