Difficult within the EU due to ISM limits.
Maybe ok for your garden camera where the authorities just don't care. But no go for any industrial usage.
Phew, I looked it up, just by curiosity. What a nightmare :') the rules, regulations, laws are damn strict Oo
We have devices sending telemetry and occasional OTA updates without urgency (if it takes a few hours to get it over it’s not a problem).
If you need consistent MB range traffic for cameras I wouldn’t advise it but for low (5kbs) traffic it can be attractive. A few thousand bits can encode quite a bit of information. Don’t be fooled by the “kbs”.