To be more specific: It might be the known problem described here: http://forum.tp-link.com/showthread.php?3604-TL-R470T-Disappearing-Web-interface/page3 It will be solved by loading the BETA...

I'm a bit confused: Why do you have (as it seems) three LAN subnets (192.168.0.x, 192.168.3.x and 10.0.0.x)? To my knowledge, the routers are only capable to serve one subnet (usually 192.168.0.x but...

Which of you has DynDNS / No-IP active? There is a very nasty bug that is resolved in the current beta firmware! The problem and solution is described here:...

If the modem is in bridge mode, its IP does not matter. If you use PPPoE, the public IP is passed to your WAN interface. I guess that's what you want. The case you describe looks like your "modem" is...

You're welcome - I don't know of a LTE modem with LAN connection and I wouldn't assume they speak PPPoE, so you might have to stick with that router as it is now..

Well first of all if you'd buy a cheap DSL modem for WAN1 to replace that router, you might reuse your WiFi router as accesspoint in your "inner" LAN, DSL WAN1 could be operated as "PPPoE / Russian...