On my Nexus S 4G, this seems to be a problem only when using headphones (happens with both pairs of headphones I have tried), not with the speaker. While listening to music, I get a buzzing sound intermittently through the headphones. Duration of one second or less. Sometimes it's rather frequent, other times it's a few minutes or more in between. It does not seem to be related to the positioning of the plug or anything obviously "physical." Anyone else have this issue? Is my phone defective and I should try to get it addressed while the phone is just a few weeks old?