The H685 WRT and H820 WRT 3G/4G Router web management interface can be accessed via the Internet if you are using a fixed IP SIM card or a SIM card/Network service that supports a Public IP address / DDNS.
Remote access to the router web management by default is enabled and you can access the router just by visiting the public IP address of the router WAN interface. You can also connect via https://
The following video shows you where the remote admin settings can be found in the menu and also the different options including :-
- enable / disable remote access to web admin
- change remote admin ports
- enable remote access from a specific IP address