Concerned AT&T customers who purchased the HTC Inspire 4G or Motorola Atrix 4G have begun to notice that their upload speeds are being capped and they have started making noise to see if the carrier will address it.
This past month AT&T launched their first pair of 4G phones which operate on the carrier's 4G HSPA+ network. Even though AT&T has upgraded their entire 3G network to HSPA+, only the markets with enhanced backhaul are experiencing the faster 4G speeds.
We know that AT&T customers with the iPhone 4 regularly see upload speeds of up to 1.5 Mbps, but it appears that all 4G Android phones are capped at a measly 300 kbps. AT&T touts smoother-streaming video as a reason to buy a 4G phone now, so it's troubling that Android customers are being treated different than iPhone users.
Research shows that the Inspire 4G and Atrix 4G both have modems that support High-Speed Uplink Packet Access (HSUPA) with speeds up to 5.7 Mbps. We don't expect to see these full upload speeds on an actual device, but at least we know the hardware supports faster speeds than what is currently available.
Word on the street is that AT&T hasn't enabled the higher speed HSDPA+ radios on the Androids but since Apple controls the iPhone firmware, AT&T can't mess with it.