AT&T said they have temporary fix that should return upload data speeds to the usual 3G speeds. Until the problem is fixed iPhone 4 users will have a maximum speed of 384Kbps. Users have reported upload speeds as slow a 32 Kbps.
The A&T statement appears below.
This is not the first software glitch for iPhone 4. There is a problem with the way signal bars appear on the iPhone 4 as well as signal loss with a left-handed grip. A software update is supposed to be in the works for the bar-issue.
On almost every cell phone there can be signal degradation from hands blocking the antenna. We posted several videos that show signal attenuation, earlier last week. Unsatisfied customers have resorted to all kinds of actions, including selling their emails from Steve Jobs to bloggers.
"AT&T and Alcatel-Lucent jointly identified a software defect -- triggered under certain conditions - that impacted uplink performance for Laptop Connect and smartphone customers using 3G HSUPA-capable wireless devices in markets with Alcatel-Lucent equipment. This impacts less than two percent of our wireless customer base. While Alcatel-Lucent develops the appropriate software fix, we are providing normal 3G uplink speeds and consistent performance for affected customers with HSUPA-capable devices."