I left my phone for a few minutes and it suddenly muted the sound. I tried rebooting it but that didn't work. I turn all the ringtone and media all the way up but that didn't work. I searched for solutions on google but all they say was that the 'do not disturb ' was on. I checked it and I am sure it wasnt on .It muted the media, so whatever app I use there isn't any sound at all. Even when the screen indicates that the media is ' all up'.There is sound on my earphones but I want to get the problem fixed insteadof just using earphones. My phone is pretty new so I hope someone will help me find a solution to this so I dont have to reset everything again.