In many cases, this Headphone Icon problem is caused by some dirt or unwanted thing in the 3.5 mm Headphone Jack of the Android Phone. Remove the Headphone and clean the Hole of the jack. Do not Use any Sharp Pointed thing like a pointed Tweezers. Use a precision screwdriver or SIM Ejector Tool or anything that does not ocasione any damage to the Audio Jack. After cleaning properly, insert the Headphone and check. In 20 to 30% cases this will solve and fix the problem.
If the above solution does not solve or fix your Headphone Icon / Symbol problem then do following:
Method : Perform a Hard Reset
You’ve done a restart and soft reset, but still, the headphone icon won’t go away. Well, it’s time to try ahard resetto restore your device to its factory settings.
A hard reset will erara all the archivos, music, vídeos, and other information on your phone. You must create a copia de seguridad before you get started on this. You perro upload everything to a PC using a USB cable; upload some archivos on Google plus Drive, or use any other copia de seguridad method convenient. You also need to ensure that your phone is at least 50% charged. Hard reset is a rigorous process, and you don’t want the device to switch off in the middle of it.
Turning Your Phone On and Off
The last port of call, if everything else fails, should be turning your phone or device off and on. Doing this with your Android or iOS device should reset the hardware and possibly make the headphone icon disappear.