Not sure why suddenly my phone is 'mute'. I didn't drop it. What I remember is after I have change some sound preference, my phone is 'mute' since then. What I mean by 'mute' is when I call someone, I can't hear anything from the person who called me, even I change to loud-speaker.
I can only hear some when I use a wired headphone.
What should I do? It is some setting problem? or hardware problem which I need to send to repair?
However my phone still got alarm sound.