Does anyone know why the audio volume goes from normal to barely audible? My phone was working fine and as I was accessing my voicemail I could barely hear the commands. When I called someone, I could barely hear the other person. I called tech support with another phone and they sent me a replacement. 2 days after receiving the replacement phone, the same thing happened to the replacement phone. I called tech support and they had me reset the phone. It worked fine for 8 days and the problem came back. So now I'm waiting for another replacement. By the way, I started out with a brand new droid 2 global and all the replacements have been "certified like new". Does anyone know what might be causing this problem? Tech support can't.