Chosen Solution
My phone plays audio through it’s speakers even when my headphones are plugged in.
Samsung j 6 headphone not working
Have you ever taken it apart? The headphone jack is modular, so it may have come loose or disconnected entirely from the board. Try shaking the phone gently. If you hear a clink, than that may be the problem.
My phone speker not working
Could it be dirty? Like dust, lint?