All the current models I see on android use the cell connection to send up the recording to be converted. I can't guess if you see how bad voice to text has been over the years. It's better but far from reliable.
Seems like half the time the voice to text doesn't work. This happens whether I am trying to create a text message, do a Google search or create an email.
Verizon Tech says that the phone does not need to access the internet in order for voice to text function to work. So if I am in a weak signal area it should still be able to convert. Anybody else having this problem?