On a side note: would it technically be possible to send Blackbytes in the same way? I know it's a bit complicated, the 12 words would need some Bytes for the fee too, but it would be a great way to use very anonymous Blackbytes if they can be sent by text-message!
It's not possible since additionnal information are needed to transfer Blackbytes, these are usually transmitted privately between 2 paired devices.