I usually listen to music at least 2hrs a day on school and free time on my cellphone. My nokia can last probably 8hrs with music, but then its not a pro phone. Would the iphone last for 2-3hr music at 30-50% volume (unless the volume is really low) and 2-3hrs wifi? By the way, whats 3G? Internet access? And can i turn off like edge and 3G if iam in a Wifi spot? So it suddenly wont connect to 3G and charge me for 10000$ ._. And whats location finder, or something..