Up to Sea Lake for another quick job tomorrow, and it turns out the Telstra wireless internet service here is trash for some reason. I kept getting Connection Error (26) on the LCD of the unit, helpfully no error message whatsoever on the web administration page.
Sat on the phone with support, where they factory reset my hot spot, reset my password and just generally fucked around to no avail before escalating the ticket. They're going to call me back in 48 hours or so, but by then I'll be gone.
It's started working again since, but it's still dog shit slow.
Edit: the next morning and it's quite fast again. Hmph.