Mount an external aerial and feed the cable inside to a sim router that then acts as a backup (maybe primary connection?) to the Vodafone wirless modem/router. I'm guessing this is feasible but what's ...

While there are gadgets that I regret buying, a mobile router is not one of them. My travel router is outdated and getting on in age, but it's still an indispensable piece of tech that I bring on my ...