Use headphones or speakers of poor quality or incompatible with the device.
Your 3.5mm headphone jack is damaged.
Plug in the earpiece closed dust, rust due to long time not clean because I used to be careful not to stick dust or steam into
Error caused by software on the device
Hardware error
2. Method to get the device out of headset mode
Currently Apple has not found a way to thoroughly fix the headset mode error. So, when the device falls into this situation, you can apply some of the following methods to resolve temporarily.
Plug in the headset (or speaker) again to bring the device out of headset mode
A simple way that you can apply and try right away if you miss your iPhone has this error: plug the headset or speaker into the phone and pull out quickly. You do this again and again to help the iPhone reset the mechanism that allows iOS to recognize when a headset or speaker is connected. This is the simplest and easiest way to fix the problem of temporary stuck in headset mode.
Try with another headset (or speaker)
In addition, you can also borrow a headset or other speaker jack to try it on your device for differences. Perhaps your headset is poor quality, not up to Apple's standards, causing your device to fail.
Restart your device
If you have applied the above two ways but the device still fails, try restarting the device to see if the situation is better? When rebooting the device, your device will be refreshed to the original settings.
Check inside the headphone jack
If all of the above methods still can't get your device out of a stuck error in headset mode, this may be due to a hardware failure with your jack.
Please use a flashlight, place it horizontally with the 3.5mm headphone jack and check if there are any traces of water or metal fiber that can cause an electrical breakdown. You can also use a toothpick to clean the 3.5mm headphone jack.
Restore iOS version
After trying everything and still not solving the problem, you can restore the iOS version because sometimes the cause of the error may be an error on your iOS version itself. However, this error is rarely encountered, but if you try to install some tweaks (Tweak), it is possible that these tweaks cause a stuck error in your headset mode. Try to bring the device to DFU mode, or update from DFU mode if necessary, and any corrupted iOS files will be replaced with new, efficient files.
Contact your service center
If the problem is not from your software, chances are your 3.5mm headphone jack is an error jack. This happens when you use a low-quality headset that does not meet the Apple manufacturer's standards. When this is the case, your only hope is to contact the service center for the earliest repair.
I wish you all success!
See more:
How to control auto-fix feature on iPhone / iPad
How many tricks have you missed using this iPhone?
Copy photos from iPhone / iPad to computer without iTunes
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