Maybe this has been noted somewhere already, but here’s my thought on setting up a cellular backup option.
It looks like you can set up the Sense Hub to WiFi, but if you plug it in to a wired LAN connection, it will default to that. In that case, if you have a cellular wifi hotspot that you can set up, you could theoretically connect the Sense HUB to Wifi on that hotspot. Then plug your HUB into a wired LAN connection. If the internet on the LAN fails, it should default over to the WiFi connection.
Yes, no? I haven’t tested this. It’s just an idea.