There have been multiple threads of people saying they are experiencing sound popping when using the 3.5mm jack, most of them say its on Pandora others will say that it happens on all mp3's or a few mp3's that otherwise sound perfect when played on their computer. To test I want to see if its a defect in hardware or if it just another Droid Does problem. I always consistently experience sound popping with my Sony headphones while playing Home by Michael Buble. If you go to youtube and search "home buble" play the first search result in high quality and turn the media volume to maximum. Listen in about 45 seconds and let me know if you hear popping.