My earphones was working fine on my xperia M4 Aqua till today when I tried to use my earphones it worked with only one ear. I tried these earphones with my laptop and both ears worked. I also tried other earphones and had the same issue. I looked inside the headphone jack with a flash light and didn't find anything strange like dust. If it needs replacement please tell me where to go, how much will it take or how much will it cost. Note, My device is still in the warranty period.
This sound to be related to the hardware in your device. As @Viridis already suggested, I recommend that you get in contact with your Local support for assistance with having your device sent in to an authorized service center for repair.
Now there is something. when I put the earphone in the jack now none of them works but when I force the headphone in the jack it works as I am pressing when i stop pressing it doesn't recognize it. And I would like to know whether the device will remain water resistant after the repair.
