Apologies if this is a dumb question - can I use this on a person phone for consumer use cases (voice/text/data)?
Companies that offer this aggregate connectivity through carriers across many countries which can vary widely in price, so they have to price in order to protect themselves in case someone only uses it in (insert most expensive region).
So you're paying premium for it to work many places. And it's intended for small data chunks that would be sent by things like IOT sensor clusters.
If you know you're only going to use it in (these N regions) you could possibly work with them to get a better rate and have them blacklist your traffic in the more expensive regions.