Water has entered the headphone jack, causing a short circuit or poor contact in the headphone jack.

Try the following method to solve the problem that the headset mode is always displayed when the headset is not plugged into the phone:

1. Restart the phone or plug and unplug the headset quickly several times until the headset mode is released.

2. Use a cotton swab dipped in alcohol and rotate it to wipe the earphone plug and mobile phone jack (the plug or jack may be oxidized) and try.

3. Use headphones to connect to the interface, turn on the iPod to listen to music, then press pause, press the home button to return, turn off the iPhone (no need to use other third-party software), unplug the headphones, and then turn on the phone.

4. If you try several times unsuccessfully and it still doesn't work, press and hold power home to perform a hard reset. Then when the white apple appears, pull out the headset to release the headset mode.

The iPhone suddenly switches to headphone mode. If headphones are not used and plugged into the phone, the phone automatically switches to headphone mode. There is no sound when playing games, ringtones, making phone calls, or listening to music. Adjust it. When the volume is turned on, the word "headphones" is displayed. If this happens, just set-general-accessibility-call use in physical activities (default)! That's it.