I spent an hour on the phone with Apple and came up with I hope is a resolution. I turned on and set up the "Hey Siri" function (which I was opposed to doing) as a work around. This function did work, although I was not able to see exactly what was typed or to who I was sending it to. I then tried the microphone button again on my phone (the one by the keypad for talk-to-text), and it now works. I hope this resolves your issues.