So I was flipping through my iPhone 3G's settings a couple minutes ago and wanted to see how much available space I currently have remaining on my iPhone. So I went into "Settings -> General -> About" in order to do so. While in this section of my settings, I noticed that under carrier I have "AT&T 3.1" listed. Previously it was just noted at "AT&T." Why exactly does it now include 3.1? What does this even mean? Any other USA iPhone users have the same info listed under carrier? Thanks guys!