I have noticed since I got a new iPhone yesterday that the volume on it is allot louder than my old iPhone I bought the first week of July. I've been sitting here checking out some tunes in the iTunes Music Store and I am just listening to them via the built in speaker. Sounds great. Whatever the problem was in my old iPhone, I hated it. The sound would go up and down all on it's own. Sometimes after syncing it would be loud than an hour later, I could barely hear it ring. That was always my only dislike with the iPhone.