It's really frustrating when you discover a headphone icon or an OTG notification on your device while your earpiece or OTG jack is not connected. This usually happens all of a sudden and it tampers with your device.

Below are 5 solutions If you're experiencing any of these.

1. Restart your device and check your audio or OTG settings. Before restarting your device make sure your earpiece is not connected to an external speaker or an OTG device plugged in.
Clean your head phone jack or USB port, overtime a lot of dirt may get stuck or accumulate in your headphone jack or USB if you're not using your designed tecno phone case.

2. Gently blow air devoid of survival from a straw into your headphone jack or USB port to hey rid of any dirt.

3. Slightly dip a curtain swab into rubbing alcohol and carefully clean your headphone jack or USB port.

4. If there is any visible dust or lint in your headphone jack or USB port, you can carefully use a toothpick to clean them.

5. If you happen to drop your device in liquid, carefully dry your headphone jack or USB port with soft tissue paper, cotton or soft clothe.

Source : https://spot.tecno.com/global/post-details/index.html?id=103821

I should try this on my POVA.