Can we develop hardware that supports Video, Voice, Data transmission on a blockchain with a Telecommunications Service Provider Use-Case?
Well yes, obviously. But not with LoRA
These are the channel settings that have been predefined into Meshtastic.
Short range (but fast) - 21.875 kbps
Medium range (but fast) - 5.469 kbps ← This is the default
Long range (but slower) - 0.275 kbps
Very long range (but slow) 0.183 kbps
As for the overhead of running the blockchain, well good luck with having enough of your 0.275 kbps left over for text, never mind video and voice.
So in practice, no. Not a snowball’s chance in hell.