Rumor has it that the long awaited staggered release for the GDR2 and Amber updates will finally make its way to the 820 and 920 Lumias on AT&T in the U.S. today.
The rumor comes from a post on the AT&T forums and well placed source within AT&T, verified to be a Community Manager, so it holds some credence:
AT&T has completed testing the Nokia Lumia 820/920 Windows Phone software update on our network. We expect Microsoft to make the update available beginning 10/10. When the software update is available for you to download, Windows Phone will notify you so you can download it directly over a Wi-Fi connection. We appreciate your patience.
This update consists of GDR2 from Microsoft that addresses some issues and adds a few features to the Windows Phone operating system. The Amber firmware update from Nokia brings a lot of new features to Lumia smartphones such as call and SMS filters and the Nokia Smart Cam suite. For more info on what the phones are like after getting the update you can check out this thread.
AT&T's 820 and 920 Lumias are some of the last to get the combo update, with users becoming increasingly frustrated especially at seeing other operators push out the updates much earlier.
Nokia's own webpage has not yet been updated to reflect this news.
Source: Windows Phone Central