Thanks for the info! Yes, I would've always used a "hub" to connect devices to the outside world, it's the sensible thing to do. I checked out the availabilit

Thanks for the info! Yes, I would've always used a "hub" to connect devices to the outside world, it's the sensible thing to do. I checked out the availability of hardware on eBay Germany, and it seems GSM/GPRS modules start at €3.00, averaging at about €12.00, whereas 4G modules start at €30.00, and average around €70.00, that's quite a hike! I'm guessing the Arduino MKR NB 1500 is something like a "reference device", and runs for ~€66.00 before tax on their own website. It has the uBlox SARA-R410M 02B chip on it. A cheaper alternative seems to be the SIM7600CE and its variants, selling from Chinese traders around €30.00 to €70.00. Does anyone have any experience with any of the chips I mentioned?