In the past few days I've started experiencing a problem with the phone's volume. Started one morning when the alarm was ringing very quietly, despite the volume being on full. Then later that day I was using a news app to watch a video and after a minute or so of the video the level of the volume dropped - again the bar was still set to full. Finally, I had a timer ring very quietly under the same circumstances. I was convinced that I had already upgraded to 2.3.7, but my phone says 2.3.6 so I am in the process of updating now. Has anyone else had this problem? Any suggestions for a fix?