Apple Vice President of Worldwide Product Marketing Phil Schiller also announced that beginning Tuesday iPhone users will be able sample and wirelessly download iTunes tracks over AT&T's 3G network or EDGE. Previously, iTunes song downloads, unlike apps, were available only over a Wi-Fi connection.
The process works relatively well, though we encountered a couple of hiccups. Like with the iTunes Apps store, you must use Wi-Fi or a wired connection to your computer to download songs over 10MB. When we tried downloading a longer song, we received a warning message advising as such. During our first download, our connection was interrupted once. We were able to reconnect and continue the download
We tried downloading a 6.4MB song over 3G. It took about one minute and 15 seconds, which is about the same as a Wi-Fi download. We then downloaded a 7.2MB over EDGE. As expected, it was painfully slow--after all, EDGE basically is dial-up speed. It took about 20 minutes to get our song, which is too long to bother in our opinion.