updated 11:00 am EDT, Tue July 6, 2010
ATT users seeing reduced mobile uploads
Multiple reports from AT&T subscribers have complained that their 3G upload rates have plummeted in recent days. Those who had uploads as quick as 1Mbps just days ago are now seeing speeds of 100Kbps or less. Tests from GigaOM have largely been limited to iPhone owners and have made it difficult to tell if the issue is independent of any one device.
AT&T has already been contacted regarding the slowdowns but hasn't responded as of this writing.
The carrier's HSPA network is primarily oriented towards downloads at 7.2Mbps downstream, but it has normally been capable of 1.5Mbps and in some cases more, depending on the device. Apple's iPhone 4 is one of the fastest as it uses a newer chipset. AT&T isn't known to fully support the HSUPA (High Speed Upload Packet Access) standard on its network, so it can't reach the peak 5.8Mbps upload speeds the iPhone 4 can handle.