Modems with SIM card includes MA180, MA260. If you want routers, MR6400, MR400, MR200, configuration is similar. You can find installation guide from the tplink website. As for the price, just go to...

What port had you opened for the web server? It should not be the same as the remote management port 8081? If you want to access the router's web server, then no need to set port forwarding. Just...

Does your MR400 work in 3G/4G router mode? When the router stops, are you able to access its admin interface?

Hi, That is Received/Sent Packets, you can go to System Tools-- Statistics to see the Bytes.

When the wifi name disappears, is the LED light on the router still on? Did you try hard reset and reconfigure it? Is the firmware up to date?

Hi, I also emailed the TP-LINK support, they said it is V2, and the hardware info will be corrected when we upgrade to the latest firmware 171225 for V2....