Hello, I have a brand new Iphone 4s and what I noticed is that I often can hear my own voice sort of amplified (sounds a bit like echo in a small empty room) when making a call. It's making conversations rather unpleasant and annoying. I also noticed that it's most herable when I am in a noisy environment, like standing on a street with traffic sounds, some wind etc. That makes me think that it might be some noise cancellation side effect. My question is - if its normal for those phones or can it be my network fault or maybe it's a faulty unit or needs software fix? Have you ever noticed simmilar effect? Thanks in advance for your insight.