Using 4G router

I live in an Eastern European countryside where my internet connection is atrocious (<3mb/s). Surprisingly though, the mobile data speeds are really good (>100mb/s). I'm going to buy a 4G router (probably a tp-link mr600 v1) and use it along with an unlimited data plan (side note: there's no...

Hello I have a ZTE Broadband Modem (ZXDSL 531B), When I turned on My Modem Today it doesn't works, Two of its light are continuous lit and when I tried to connect Internet. it shows that "Cable is unplugged" Please Help me and tell if it can be fixed :(