Who I have the same questioned this topic

Here's the fix.  Bring up your texting app.   Start a message and get the keyboard.   Looking in the lower left corner of the keyboard.   Second key from the left will be a gear looking icon.   Press and hold it and four choices popup, the gear, the microphone, the emogie, and a notepad.   Select the microphone.  The microphone will stay there until you change it by selecting another of the four choices.  Nice of Verizon to let people know when they are changing things.   Maddening.... (You might need to reset your language and input choices too, if you messed with them while trying to get the speech to text to work.)