[blurrywh]

Interesting product. The only use case I see (from an European perspective) is:

You move into a new office building with your small startup team and depending on the country and Internet provider it can take up to six weeks or even longer until you get an Internet connection (even if you just take over an existing account, it's a mess sometimes). Then your device paired with good data plans would be an awesome substitute.

However, nowadays small teams go rather into turn-key team spaces from coworking spaces where all is set. So the real need might be quite small (because there are just so many good offers). Big teams/companies usually move once the target location is fully setup, so they shouldn't need such a device.

Edit: Another thing: Since LTE you can get constant 150Mbit down and up with one SIM and device. There are already plans which offer this 150Mbit up and down and unmetered for 200 EUR/month which is a very good deal considering the specs. And you just need a normal smartphone as the hot spot. So, I wouldn't build such a device.