AT&T just sent CNET a note letting us know that it has started rolling out an update for the Inspire 4G that will enable the HSUPA radio on the smartphone, along with a number of other bug fixes and performance improvements. The carrier has completed testing on the update for the Atrix 4G as well and will begin deploying the software soon.
The updates will roll out in batches over the coming weeks, and users will receive a message on their phones when it's available. You need a Wi-Fi connection to download and install the software, but afterward you should see faster upload speeds.
In mid-March, after numerous complaints from customers, AT&T finally admitted that the HSUPA radios, which enable faster upload speeds (up to 5.76Mbps) on mobile phones, were not actually enabled on the Inspire 4G and Atrix 4G. The carrier did, however, keep its promise to deliver an update by April, and though the company waited till the very last minute, we're glad to see it.
Let us know how the update goes for you and if you're seeing improved speeds.