I've seen a lot of comments about the voice breaking up and not being able to be heard except on speakerphone, but yesterday, my phone just stopped being able to be useful to call anyone. My speaker works (I can hear music, etc), but I cannot hear anyone who calls me either by the "ear" speaker, or the speakerphone, and they can't hear me either using my mic or speakerphone. Has anyone else had this problem? My phone is totally useless until I get this resolved.