sound profile issue on the first day itself... rest all is ok.... or is it just me or maybe too early

i was listening to music on headphones... got a call. made a call. i hung up... then was just on ab reak for 15-20 minutes and when i got back to my phone and tried to call someone... no sound... everything had gone mute and then the phone REBOOT by itself... after that one reboot .... no issues for hours....

seems to be the same sound profile muting issue... same used to happen

in fact the previous .694 AT & T version was really good and solid.

if it happens once more with this i will just switch back.

anyone experienced it?