- 02-16-2011, 12:47 PM #2
This happened to me a couple of weeks ago. I couldn't figure it out, I checked and all of my volume levels were all the way up. Then I tried to watch a youtube video and the volume was all the way down. after turning it up to thear the video and locking my phone I heard the sound again. For some reason it responded to that instead of the volume in the settings menu.
Hope that helps.