@IT-Guy The China Unicom SIM card should be fine. eSIM is not supported.

@IronDreamer Hi, TP-Link EasyMesh routers don't support PoE, thus I am afraid there is no recommended solution.

@Despero Try a factory reset by holding reset button on the router for about 10s, those offline devices should be removed from the list.

@narcis_em Reboot the router via the router web interface is possible, but usually there is no option to power it off only, because after the router is off, you will lose control to the router unless...

@mayone When it works on Ethernet WAN, it will not consume data of the 3G/4G WAN. For Tether App remote management, I guess more data will be consumed since the device need to communicate with cloud,...

@fish_bone94 Try to use an older version OpenVPN Client to see if it works.