Hi
ze.resendeThank you for asking. Could you provide me which firmware version are you (Setting >System>About Phone>Software information)?
If you try to update to the latest version, does the issue still remain?
Also, does the issue happen in cable earphones, bluetooth earphones, or both types?
Please tell me the brand and model of your headphones that have this problem. Have you tried with the ASUS earphones that came with the phone?
Do you mean you cannot hear any sound from your headphones, instead it comes out from the earpiece? When during a phone call, can the sound be received normally from your headphones' mic?
When the problem appears, is the headphones icon shown on the notifications bar after you plug in the headphones?
Please tell us the app versions of these apps.