Several people, myself included, are experiencing buzzing/rattling in the earpiece during voice calls. In my case, if the volume is over 50%, the earpiece periodically buzzes and vibrates like it's a little loose. This is my 2nd Triumph, and the first was exchanged for precisely this reason. The first one was doing this even more. I'd like to know if this is a general issue on all of them, or if I need to exchange mine yet again. So, if you can, please state the following in your response: 1. Does your earpiece buzz/rattle during voice calls? 2. If yes, under what volume ranges? 3. If yes, how bad would you say the buzzing is, say on a scale of 1-10? Thanks.