I use mine as a GPS and mp3 player while riding my motorcycle. I just switched to the curve from a Nokia so i'm still learning. This issue I have is while listening to mp3's through the ear buds that came with it, as I start going down the highway the audio will drop completely, then come back. I thought it might be vibration, but I have eliminated that. All I can figure is there is enough background wind noise that is effecting something and causing the audio to drop for a few seconds. It's so bad, that above 60, I might as well not even have it on. At about 30 or so, it only does it once in a while, but it's a huge pain. I plan to use it while mowing as well, and can see that not happening either. Any ideas?