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 ...

I've been running an airport extreme for around 1.5 years or so. For the life of me I can't remember why I decided to go this route instead of a non-Apple router. I think it had to do with my thought ...