A few weeks ago, many AT&T customers using HSUPA-capable wireless devices (like the iPhone 4) started reporting extremely slow upload speeds on the 3G network. They were promised a software patch, and it looks like the release is upon us.
In partnership with Alcatel Lucent, the fix has already started going out, and it should cover everyone within the "next two to three weeks." The cause still seems to be a bit of a mystery, however, and AT&T's previous response about this was that the error was “triggered under certain conditions.”
While it only affected two percent of AT&T customers, hopefully that patch does the trick because trying to send emails at speeds of 384 kbps per second when paying 3G network prices sounds frustrating.