Interesting. The person it happens to with most for me is when talking to a friend with an iPhone 4 (on Verizon, I'm on ATT).It happens to me whenever I talk to someone that has a cheap, flip phone, such as my dad. If I talk to my son, who's using an Evo, it doesn't happen.
I don't talk on the phone much, but I did notice it with both my dad and half-sis. They both have free flip phones, I've talked to my son and another friend on Evo's with no problems, but that's a pretty small sampling.Interesting. The person it happens to with most for me is when talking to a friend with an iPhone 4 (on Verizon, I'm on ATT).
To the other reply, yeah I haven't figured out any pattern either. I try hanging up and calling back; restarting...sometimes it's just there and won't go away...other times sounds great. Frustrating.