Re: Your IOT device
Buzz is all fine and good, too bad you cannot run wind turbines on it.
A quick glance at LoRaWan reveals it's hobbyist based for infra and "business" cases. Let's deploy that for a medical monitoring device for home care that needs to work anywhere in UK (within reason), shall we? How about no?
I'm sure it's great for IoT hobbyists but for something that actually needs any kind of reliability or ability to take "out there" and expect it to work, not really.
SigFox is a bit more reasonable but it's non-existent in Wales and whole of the northern UK except for narrow band between Glasgow to Edinburgh.
LTE-M(1) requires software update to the basestations so there's no real reason why networks couldn't roll it out easily, except I'm sure Huawei and Ericsson want about a billion for the firmware update.
That leaves us with LTE CAT-1 which works, is a bit cheaper than regular 4G and has a bit better reception. 2G is fine and good but if you need something that's expected to still work in 5 years time, betting on 2G networks seems a bit iffy.