Ok so this is the first problem I've had with my evo so far. In the last two days my external speakerhas stopped working but only after I change the profile to vib or silent then go back to normal. To get sound again I have to do a battery pull then it works again. So I have a feeling its a software issue. I wanted to know 1st if any one else has had this 2nd what do I want to use to back up to do a reset. And 3rd how do I do a reset.