AT&T have announced that within the next few weeks they will be rolling out a software update to the and the Motorola Atrix 4G which will unlock the HSUPA barrier on the phones. Read what AT&T said with regards to this announcement.
"Today, AT&T began to deploy an update for the HTC Inspire™ 4G that provides, among other features, the addition of enhanced uplink speed technology. (HSUPA).
An update that adds HSUPA for the Motorola ATRIX 4G has cleared testing and will be deployed soon.
Both updates will roll out to customers of both phones over the coming weeks. Users will get a message on their device notifying them of an update and to connect to Wi-Fi to download it. After downloading it, the user needs to only allow the update to automatically install." - AT&T