Engadget says that HSUPA has been disabled in the firmware. Stay tuned, this is going to get interesting.
Ready for your cellular network lesson of the day? HSPA is broken down into two parts: There’s HSDPA, which is used for download, and HSUPA, which is used for upload. In order for a device to fully utilize HSPA, you would need HSDPA and HSUPA. Oddly enough, AT&T’s new HTC Inspire 4G does not support HSUPA.
According to Android Central, when AT&T was questioned about terrible upload speeds experienced by many an Inspire user, all they had to say was that the device doesn’t support HSUPA.
It’d certainly be nice if there was more of an explanation as to what’s going on, but for now, those average upload speeds of 200-400 kbps are here to stay. We’ll be sure to keep an eye out for any more info on the situation.
Via Android Central