How to exit headphone mode

Try inserting and re-inserting your headphones 7 or 8 times. Also try cleaning out the headphone jack in case of debris that might be interfering with the connection/disconnection. Some users have also reported tripping the micro-switch at the very bottom of the headphone hole with a long thin tool, but you do this at your own risk, of course.

just put your mouth over the jack and suck it as hard as you could . it just solved my problem . ✌️