This problem started after I started using Bluetooth headphones regularly. Here's the deal. I had Bluetooth headphones connected. Now I disconnect and turn Bluetooth completely off. At this point I can play audio over my phone speakers fine with no problem. Now I plug in my regular headphones through the headphone jack. Sound is still fine. If I unplug the headphones now, the phone magically thinks the audio is supposed to come from a Bluetooth device and shows me the +/-audiobar with the little Bluetooth symbol on the lower corner even though Bluetooth is still turned off on my phone. I have no loudspeaker sound and can't disconnect the fake Bluetooth unless I connect a real Bluetooth device to my phone and disconnect it again. I could use normal headphones again though, but after I unplug them it's the same thing again. I doubt there's an easier fix than what I described or restarting the phone, but maybe someone knows what the problem is. Thanks in advance.