Recently I have noticed that when I receive an email, text message, or lock/unlock my phone, 16 gig black 3g, that there is a echo everytime. If I receive an email it makes the normal loud sound the a softer muted sound right after. The same thing happens when I lock and unlock and text. I haven't jbreaked. It started before 3.1 was installed and continues to do it after I updated. Anybody had this problem or know what it could be? I tried doing a restore and it didn't fix it.