Hi, that is definitely abnormal behavior. I suggest you go to your device
settings followed by General and then keyboard and turn off dictation and turn
it back on. After you have done this, try to use dictation without the
headphones. Now if that doesn't work, I would suggest to power off
guys,
I’m finding that dictation only works on my iPhone 6 with iOS 9 or 10 when my
earphones are connected. Since my phones have a bad wire that causes only one
ear to work, I assumed that the failure of dictation was global. but, weirdly
enough, when my phones are connected, I get a great