Hey Guys, Recently I switched from AT&T to Verizon Wireless. I purchased a CDMA iPhone 4 because it fits my needs. However, it's been about 8 years since I was on a CDMA network. I love the call clarity and 3G data speed in my area. However, once in a while when I am within the first few minutes of a call, I will hear an odd "zzzzht" "zzzt" zapping noise. This sometimes goes on for 10 seconds or more/less, then disappears for the remainder of the call. I never heard this on my GSM iPhone besides the interference with some speakers. Have any of you on a CDMA network heard this while on a call? Or is it my iPhone's earpiece?