I've had this issue ever since I received my phone on launch day, but it's become increasingly annoying. When I talking to someone, if they speak at a decent volume, then they sound just fine. If they dip to a at all sub-normal voice level, though, then their voice starts cutting out like it's being interpreted as background noise or something. I've read that there is some kind of signal processing that is meant to filter out background noise and it seems like it's over sensitive. Is it possible to adjust this. Has anyone else has similar issues? Thanks!